Updated the base logic for head-minified stylesheet
Changed the naming of head stylesheets
Changed the logic to empty the cache from admin
Changed the way to manage css and js cache
Code refactoring for the new cache management
Defined the garbage collector for older cached files
Changed the logic for running the garbage collector every 10 days
Added better comments for the main class
Added test framework
Defined the initialization test for admin functionality
Defined test for admin initialization
Defined the test class for AM init
Added test for the garbage collector
Defined tests for extracting css and js from the wp queue
Added script test