Pull most code into Given core.
Really rough integration of Minitest and RSpec Givens
Fixed examples for minitest.
Update todo
Fix before issue with Minitest.
Use _[Gg]vn_ prefix

(instead of _rg_/_rgc_)
Add explicit framework object
Method extract assert_naturally
Add :rs and :mt rake targets
Update todo
Fix merge problems
Remove unused failure method.
Move framework specific code into framework directories.
Custom Failure Matcher

For cross platform uniformity.
Move multi-platform hacks into Framework and framework directories.
Hack to work with Minitest 4.x
Remove gemspec

We are no longer using it for the gemfile.
Multiple-gems for minitest/rspec/core.
Update README for minitest/given.
Add backward compatibility RSpec::Given.use_natural_assertions.