Update composer to RC4
Merge pull request #49 from shanethehat/feature/update-composer

Update phpspec to RC4
Lock PhpSpec and Prophecy to the previous working version until the recent composer issues get resolved properly
Merge branch 'develop' into hotfix/rollback-dependency

Conflicts:
	composer.json
	composer.lock
Merge pull request #50 from MageTest/hotfix/rollback-dependency

Lock PhpSpec and Prophecy to the previous working version