Typo, I suppose.
Correctly handle it when branch exists, but doesn't have merged commit.
Mock git.capturing.
Bump Minitest

Use minitest 5; drop minitest-ansi, include wrong explicitly.
Clarify mocha dependency.
Use Cucumber from git master (until next release that works with minitest 5); drop Ruby 1.8.7 support.
Merge branch 'develop' into feature/vendor-ref-info

Conflicts:
	lib/vendorificator/environment.rb
	spec/vendorificator/environment_spec.rb