Removed nightly test scripts -- moving CI to travis
Travis should now pay attention to rspec failures
Update Travis ruby version

Bug with exit code in travis was caused by a bug in Ruby -- read more here: http://bugs.ruby-lang.org/issues/5218
Exclude development gems during Travis runs

Development gems (specifically, binding_of_caller) weren't able to install on travis, and were breaking the build.
Merge pull request #3 from rwash/travis

Fixed Travis setup -- it now reports failed builds