Replace deprecated methods with newer alternatives
using https://rubygems.org instead of :rubygems as source
Merge branch 'master' of github.com:techthumb/rspec-longrun

Conflicts:
	Gemfile
Provide fallback implementations of XXX_color.

This allows rspec-longrun to work with older versions of RSpec,
without triggering the deprecation warnings in 2.13.x.