Improve README and code examples [ci skip]
Merge branch 'master' of github.com:krisleech/wisper
exclude rake, flay and simplecov from being installed on CI env and remove guard dependency [#27]
Merge branch 'fix-ci-deps'
Wisper.add_listener now accepts options.
Merge pull request #27 from kammerer/master

Allow passing of options when registering global listeners
bump patch version [SKIP CI]
Merge branch 'master' of github.com:krisleech/wisper
Allow stubbed publisher method to accept arbitrary args

With this, using the readme's example, you could do `publisher.execute(arg1, arg2, …)` without getting a "wrong number of arguments" error from RSpec
Merge pull request #29 from charlietran/patch-1

Allow stubbed publisher method to accept arbitrary args
fix broken travis rbx build
Merge branch 'fix-travis-rbx-build'
finish: Allow broadcast events to be prefixed with "on" [#30]
Merge branch 'on-prefix'
Updated specs to pass under rspec-3
Merge pull request #36 from reverbdev/rspec-3

Updated specs to pass under rspec-3
finish: Allow listeners to be globally subscribed to all instances of a class and its subclasses [#31]

* class can be given as a class, symbol (camelcase) or string, or collection of the same.
Bump minor version to 1.3
Add "Gem Version" badge to README
Remove version constraint from Gemfile example so we don't have to remember to update the README when bumping the minor version. [SKIP CI]