Cleans up Gemfile

the warnings are going to drive me nuts
single quotes only
Merge pull request #280 from ophrescue/gemfile-cleanup

Cleans up Gemfile
Update README.md
Adds Database Cleaner gem

allows a fresh db to be used between test runs
WIP Adding specs for dog model

Also adds factories
Cleaned up, minor changes
Merge branch 'dog-specs' of github.com:ophrescue/RescueRails into dog-specs
Removing duplicate line
Merge pull request #281 from ophrescue/database-cleaner-gem

add database cleaner gem
Merge branch 'master' into dog-specs

Conflicts:
	Gemfile
	spec/spec_helper.rb