Transform API mechanics

2.0.1 -- Hotfix :)

• proper scan of productFlavors and buildTypes folders for aj source sets;
• more complex selecting aj sources to compile;
• more precise work with jars;
• changed jar filter policy;
• optimized weave flags;

2.0.0 -- Brand new mechanics

• full refactor on Transform API;
• added new options to aspectj-extension;