add CodeClimate and Gemnasium
fix gemspec requirements
travis and readme update for active support 4 and 4.1
adding rails 4 support
doc and gemspec update
travis update for rails 4 tests
old ruby compat
don't double store if using raw_value
invalidate older cache data store when upgrading to 0.3.0
upgrade note
Merge branch 'release/0.3.0'

Conflicts:
	lib/mongo_cache_store/version.rb