added the possibility to deactivate pusher triggers
added test for commit 01681395401986658ecaf8f5c14c7525f7ebcb13
prefixed triggers_active attribute
Merge branch 'master' of https://github.com/tonycoco/pusherable
Merge branch 'master' into feature/deactivate_callbacks
Merge pull request #5 from jdurand/feature/deactivate_callbacks

Adds the possibility to deactivate pusherable triggers before bulk updates etc.