rspec tests and example.rb successfully run
Added new method to allow for text to speech capabilities. Updated methods to conform to v3 of AT&T Speech API. Added examples and rspec tests describing text to speech.
Returned gemspec summary to it's original form, expanded the description.
Converted tabs to spaces so that YAML is valid and Travis CI build succeeds.
Merge pull request #1 from PWx21/tts

TTS