Adding unit tests for automatic unregistration of extension dependencies
Bug fix: was not properly unregistering extension dependencies beyond 1 level deep.
Updating podspec. Min deployment target is iOS 6.0. Fixes issue #38
adding initWithFilter:sort:view initializer for dynamic groups
refactoring to smaller methods, conditionally updating groups only if needed. started renaming/reorganizing tests to make their intent more clear.
reorganizing tests for view mappings.
renaming more tests to describe test
updating tests for dynamic group addition to mapping for happiest path... pending tests for making sure ranges, reverse, dependencies, and consolidations remain intact.
writing unit tests, handling dependencies, isReversed and rangeOptions differently.
fixing autoconsolidation issues, updating groupname validation for modifiers
fixing deleting rows check, to make sure we are getting rows that may have been moved.
Merge branch into 2.4

Resolved Conflicts:
	Testing/UnitTesting/TestYapDatabaseFilteredView.m
	YapDatabase/YapDatabase.m