Package mapsoft2: Information

- vmap2
  - create typ-file source from type configuration
  - rewrite mp/typ FID and CodePage handling 
  - fix angle handling (more accurate now)
  - when writing FIG files do not set MapType=label for text objects, do not require RefType field
  - group/group_ru fields in the type information file
  - fix object comparison (inf, nan values in scale and angle fields)
  - more functions for working with vmap2 object types
  - fix object selection range when updating labels
  - read/write vmap2.gz files (uses iofilters module which is gnu-specific!)
  - (!) use options instead of tags in VMap2 objects
  - write ref_pt field if ref_type is not set (now it's independent parameters)
  - support for multi-line text
  - fix error in line joining (min angle calculation)
- vmap_data:
  - rewrite default type configuration, add new types, split render config
  - settings for mp/typ/img FID and CodePage in vmaps.sh
  - a fiw errors fixed in scripts
- add program ms2vmaptypes for handling vmap types
  add module gis for reading GeoPackage/Postgis
  rewrite rewrite shape module
  start making vmap2 editor (--edit option for ms2vmap)
- rendering vmaps:
   - allow dash, cap, join drawing features for points (useful together with lines feature)
   - add stroke2 drawing feature
   - add stacks for drawing steps (save_to_stack drawing feature and render_stack command)
   - add shift drawing feature
   - add text_vspace drawing feature (multi-line text)
   - fix pattern scaling in "draw_pos fill" feature
   - change logic of move_to/move_from/rotate_to features:
     single list of rules with separate distances,
     all are tried until the first successful one
- map projections:
   - rewrite aliases, allow EPSG:* names
   - add aliases for NO and SE systems
   - support for a few EPSG projections when writing OziExplorer map files
- geo_mkref
  - allow fractional dpi setting in proj mode
  - fix setting border from multiple multy-segment tracks (each segment should form a separate loop)
  - support for --north option in nom_fi reference
- fig
  - fix fig metric resolution (1200dpi/1.05 -> 450)
  - when making compound set coords to zero (we can't calculate it for text; xfig will recalculate zero coords)
- image_tiles:
  - add ms2mbtiles tool
  - mbtiles: sync mode setting with default value 0 (fastest)
  - mbtiles: in layer_write() check if tile exists before deleting it
- geo_data: add geo_nearest_vertex_2d(), geo_maxdist_2d()
- geom: Line constructor with two input iterators
- geom: add dMultiLine::get_first_pt()
- geo_nom_fi: support for 1/2 maps (V5111AL), return scale from nom_to_range_fi
- image_tiles: add {b} special char in the url mask -- EPSG:3857 bbox
- write_geoimg: do not throw error if rendering range is empty (could be a valid situation)

- Improve support for tiled maps. Add MBTiles support
  Now ms2view and ms2render can use mbtiles as input map format,
  ms2render can render tiles directly to mbtiles.
- Support for Finnish standard maps (e.g. V51) and Finnish grid.
- Rewrite map rendering scripts (vmap_data/scripts). Direct rendering
  to mbtiles. Update map data. Important fix of Garmin TYP file.
- Add ms2view desktop (#70, thanks to sikmir)
- Fix and improve contour rendering and smoothing (image_cnt module, ms2geofig program)
- vmap2:
  - allow larger type numbers (3-bytes instead of 2)
  - new features for rendering vmaps: "grid_labels", "draw_pos fill"
  - add a few functions for custom map filtering
  - support for objects types > 0xFFFF
- write_geoimg:
  - mbtiles support
  - default background: transparent for tiled maps, white for others
  - add --fillcolor, --zfill, --swapy options
- viewer:
  - Objects can check drawing range, in advance. This is used in
    tile rendering to avoid reading/creating tiles which are not needed
    (slazav/mapsoft2#61).
  - Get rid of prepare_range mechanism. It was an attempt to do
    parallel downloading of tiles, but it ignored caching and did a lot more
    additional work. Now tile downloading is requested one by one, during
    rendering.
- geo_mkref:
  - rearrange code, move creation of individual reftypes to separate functions
  - fix --border_file option for multi-segment tracks
  - move geo_mkref module inside geo_data
- geom:
  - rect_to_line for empty rectangle gives empty line instead of exception
  - line filtering with Ramer-Douglas-Peucker algorithm
- conv: fix ConvBase::frw_acc for conversions with different x,y,z scaling (such as geo projections)
- image: fix error in coordinate range check
- shape:
  - fix reading objects with nParts=0
  - add shape_dump program
  - add methods for getting dbf field parameters
- pulkovo grid: fix zone boundaries
- rainbow: return lowest color for NaN value
- filename: add ls, glob, remove wrappers
- module system: fix multi-threaded builds (slazav/mapsoft2#69)
- geo_data: fix error in writing Ozi map reference
- jnx module: a playground for jnx format

build system:
 - notests makefile target: much faster build without tests
 - -Wstrict-aliasing=1 by default
err/assert_err, image: fix compilation warnings, remove c++17 features
tmpdir: update for new libzip interface
geom:
 - rect_crop_multi() function
 - Line::area() method
 - simplify check_hole() function
 - fix nearest_pt() for 0- and 1- point lines
 - fix error in join_cross()
geo_data/io_gpx: do not show 1s timestamp in track points (default nakarte timestamp)
fig_geo: add --compound option for fig_add_*() functions
geo_render/gobj_trk: fix speed drawing mode
srtm: a few important fixes
image_cnt: rewrite river/ridge tracing code
vmap2: fix conversion of muplipart objects to fig/gpx
vmap rendering: allow move_to feature for areas and points; add move_from feature
vmap_data:
 - scripts: do not crop maps by default when updating from MP/FIG
 - scripts: always crop map when generating mp/img
 - add source for typ file (2012, A.Tonis, corrections by S.Orlov, S.V.)
 - remove compiled slazav.typ file
 - use line:0x24 (former swamp line) as glacier crevasse
 - render.cfg: draw borders with semi-transparent line
 - render.cfg: move roads from rivers; move summits to auto summits
 - add labels to some point objects
 - tune xfig text size
ms2nom program: --cover_ratio option
ms2geofig: add --compound option for adding fig data