Some style updates.

* Changes symbol hash syntax to Ruby 1.9 style.
* Adds spaces around  block syntax
* Reduces all lines to less than 80 characters
* Removes 1.8.x Ruby varieties from travis.yml
Merge latest from master
Fixes merge conflicts with latest master
Converts some more hashes and spaces out curly braces
Merge branch 'ruby19hash' of https://github.com/philnash/twilio-ruby into philnash-ruby19hash

Conflicts:
	spec/util/capability_spec.rb
bump to 3.13.0