remove deprecated methods, contains breaking changes
add rbx back to CI
Merge pull request #83 from krisleech/remove-deprecated-methods

remove deprecated methods
remove rspec matchers and stubbing (moved to wisper-rspec gem)
fix markdown syntax [skip ci]
Merge pull request #85 from krisleech/remove-rspec-helpers

remove rspec matchers and stubbing (moved to wisper-rspec gem)
Add CONTRIBUTING.md [skip ci]
add yard gem, mark private api and add a couple of examples to docs [skip ci]
small refactor of broadcaster method for readable, add docs and return configuration
drop support for Ruby 1.9.2