Remove the automatic engine require

MSP-11412
Bump the version

MSP-11412
Require the engine in the dummy app

MSP-11412
Add a note about engine require to README

MSP-11412
Dropping pre-release post PR #29 land

MSP-11412
Merge branch 'master' into staging/rails-4.0

Conflicts:
	lib/metasploit/model/version.rb