Extend world with Test::Unit::Assertions
Extend world with MiniTest matchers
Just use main as the world - assertions look more natural
Add support for RSpec 2.14
Test support for rspec 3.0
Add rspec 1.3.2 support
Separate assertions scenarios from autorun scenarios
Find test library and stop
Detect rspec early
Introduce `AssertionLibrary`
Move AssertionLibrary into its own file