added ability to not log ignored events
refactored ignore code to allow for multiple ignore calls and to make way in the future for other specific types of canned ignore statements, e.g. ignore_ip
Merge branch 'master' of github.com:roidrage/lograge

Conflicts:
	lib/lograge.rb
	lib/lograge/log_subscriber.rb
	spec/lograge_logsubscriber_spec.rb
Merge pull request #39 from jpslav/master

Adds ability to skip logging for events meeting configured criteria