:only and :except options can now take a single symbol as an argument just like routes.
Merge pull request #50 from GuilhermeSimoes/allow-symbol-in-only-and-except-opts

:only and :except options can now take a single symbol as an argument
Changing wording on README
Merge pull request #52 from andmej/patch-1

Changing wording on README
Added TOC to README and mentioned discussion group
allow custom fields, but only whitelisted ones #55
unify :params and :parameters on #create_activity
resolving values on custom fields, #55 #awesome
fix Config Singleton
fix uninitialized Singleton in config
fix leaking action into later activity params
initialize orm and config when including into models
minor style changes in config
Merge branch 'master' into mongoid

Conflicts:
	lib/public_activity/config.rb
	test/test_helper.rb
	test/test_tracking.rb