Fixed cards submitted by cbt33 - see list of changes:
* Scrivener - Changed filter message, change EntersBattlefieldEffect to EntersBattlefieldTriggeredEffect
* Earnest Fellowship - Moved comment line, Changed layer of EarnestFellowshipEffect to AbilityAddingRemovingEffects_6, changed outcome. Removed unneccassary init method. Simplyfied apply effect, adding maximal one ProtectionAbility to a permanent, before Filter and abilities were all redundant for multicolor permanents. Fixed wrong sourceId for addAbility.
* Hallowed Healer - Made targets mandatory (default number of targets 1 has not to be set), Fixed tooltip text (Threshold, tap symbol, dot at the end).
* Treetop Sentinel - filname missed the "java" extension. Changed filter message.
* Bloodcurdler - removed unneccessary comment, replaced card name by {this} for rule text, corrected the descond effect of the threshold ability (this is no cost it's an effect).
* Buried Alive - Moved comment line, fixed sourceId for moveToZone.
* Think Tank - removed unneccessary comment, LookLibraryAndPickControllerEffect could not handle the effect.
* Words of Wisdom - added missing tooltip text, removed unneccessary comments, fixed indentation     
* Unifying Theory - removed unneccessary comment, simplified UnifyingTheoryEffect, removed dot from effect static text.
* Ancestral Tribute - fixed indentation.