v3 Skin package name for search

[Ducktamine]

Hi. 

Readme says following:

• change application package, preferable to something containing ".Poweramp.v3.skins." as this is the substring that will be used in Poweramp to search for skin APKs in Play

But old skins, updated for v3, could contain other package names. Would be nice to have some additional option to mark your app as  suitable for v3 to be in search results. Or maybe devs would add there own list of approved skins app names to be used in search resutl along with  play store .Poweramp.v3.skins.