Added PyGTK installation to .travis.yml
Fixed PyGTK installation to .travis.yml
Updated .travis.yml in order to correctly install PyGTK
Updated .travis.yml in order to install PyGobject
Added sudo permission to PyGobject instalation
Tweaked .travis.yml
Merge branch 'master' of github.com:Zizaco/newrelic-indicator
Fixed some typos