Merge branch 'release/2.1.3' into develop
[CS] Celluloid no longer defines ActorProxy#join
[BUGFIX] Reduce mutable surface-area of Call
[FEATURE] Track peer calls when joining
[FEATURE] Allow specifying controller metadata when originating outbound calls
[FEATURE] Allow specifying confirmation controller metadata to `CallController#dial`

Fixes #190
[DOC] Fix typos (#ask should be #menu)
[CS] Remove step definitions duplicated from Aruba
[DOC] Remove duplicate @option line
Merge pull request #209 from libryder/fix_recording_docs

[DOC] Remove duplicate @option line
[FEATURE] Set default voice on output components when specified in config
[CS] Make config init intention clearer
[BUGFIX] Add test to ensure spec helper is generated in a new app
[BUGFIX] Add rspec rake task to newly generated app
[BUGFIX] Require spec_helper.rb in generated controller specs
[CS] Whitespace
[BUGFIX] Add rspec to generated app Gemfile
[CS] Clean up warnings
[CS] Better RSpec defaults
[DOC] Changelog entry for spec generation