WIP
Merge branch 'decomposed_events' into staging
Add Ruby 1.8.7 compatibility
Merge branch 'ruby_187_compat' into staging
Bump version
First testable version
Bump version
Add interface to class-level receiver
Revert "First testable version"

This reverts commit 3fa182032af83b7f8f866695bf262515987e9e20.

Conflicts:

	lib/sendgrid_postback/event_receiver.rb
Cleaned up initialization defaults