Support Calabash Lite mode which uses pure UIAutomation and runs without server
Merge pull request #480 from calabash/calabash-lite

Support Calabash Lite mode which uses pure UIAutomation
Fixes ci-helper install_gem logging.

Now prints the correct name rather than 'calabash-cucumber'
Bundle install, then rake install

Don't $ bundle exec rake install; we need to do what
a user would do.
Add dotenv dependency to use .env for test config

Specifically, add support in test/xtc directory for setting
access tokens and device sets privately.
Adds XTC test resources
Script for executing an XTC job
Adds xtc submit to local-run-as-travis.rb
Adds xtc-submit-ci script to travis CI