remove private attr_reader and use ivar
deprecate `add_listener` in favour of `subscribe`
Revert "comment out coveralls until it is fixed for Ruby 1.9.2"

This reverts commit f54080f0ea3e4855aafa8c227903ba8041f2a1bc.
add an alternative way of mapping events [skip ci]
deprecate aliases in preparation for version 2

* deprecate `respond_to` in favour of `on`
* deprecate `add_block_listener` in favour of `on`
* rename `with` to `subscribe` in TemporaryListeners
* rename `add` with `subscribe` in GlobalListeners
* Move parsing of options from arguments in GlobalListeners
remove rbx from CI until rubysl-openssl is fixed
Merge pull request #81 from krisleech/deprecate-aliases

Deprecate add_listener, add_block_listener and respond_to
bump minor version to v1.6.0
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 regexp support to `on` argument [#79]