Package cve-manager: Information

- Fixed determination of groups using package/products URLs.

- Improved mapping algorithm that now operates with the so-called "groups of
  packages and products" (a product of one special group cannot be mapped to a
  package of another special group) and takes into account special prefixes and
  suffixes of products;
- Ability to specify multiple URLs for a single package in the list of ignored
  matches;
- Minor fixes and improvements.

- New ability to assign CPEs that will be recognized as related to each other;
- Improved interaction between the main module and the module "cpe-map"
  (products will not be remapped using those types of mapping that have already
  been used).