Refactoring. Parsers were redesigned. Generic caching meghods were moved to base class
Base parser is implemented as abstract class by using abc module
Bugfix for magiccardsInfoParser getting cards' legality procedure. Some html symbols and common prefix weren't truncated before
Bugfix for GatheringWizardsCom parsing cards' description procedure. It's recursive now to parse or inner html-tags
Test application to compare parsers' results