First draft of lay_audio sending a renderer option.
[FEATURE] Added the ability to specify a renderer in play_audio.
Changelog entries conflict
Broken build
Wrong formatter in #play_audio
Merge branch 'release/2.2.1' into develop
[FEATURE] Make it possible to specify interrupt digits when recording
[BUGFIX] Continue to accept calls when stopping, as documented
Merge pull request #247 from chewi/bugfix/accept-when-stopping

[BUGFIX] Continue to accept calls when stopping, as documented
Merge branch 'refs/heads/develop' into feature/output_renderer
[FEATURE]#play and #play! now support the renderer option
#interruptible_play, #stream_file and #menu now have support for the :renderer attribute
Allow ruby-head build to fail
Menu was not passing correct args to #interruptible_play. Refactored argument parsing for output, plus other CS improvements.
Merge branch 'develop' into feature/output_renderer
[DOC] Better changelog entry
Merge branch 'feature/output_renderer' into develop
[DOC] JRuby >= 1.7.0
[DOC] New link to contribution guidelines
[BUGFIX] Validate menu input before checking the digit limit

Input that has reached the digit limit may or may not be valid but we won't know which if the validator has not been applied first.