Remove the automatic engine require

MSP-11412
Ensure dependent metasploit gems load from correct locations

MSP-11412
Add a note about engine require to README

MSP-11412
Bump version

MSP-11412
Add engine requires to dumy application.rb

MSP-11412
Point the metasploit gem deps at the proper branches on GitHub, for the moment

MSP-11412
Use https urls so travis can test
Adjustments post PR #75 land

MSP-11412
Bump minor version to work around RubyGems bug
Merge branch 'master' into staging/rails-4.0

Conflicts:
	lib/metasploit/credential/version.rb
	metasploit-credential.gemspec