(maint) Add Travis CI support to active branches

Without this patch all active branches do not have proper Travis configuration
files.  This is a problem because Travis will exercise any branch pushed to the
puppetlabs organization repository on Github.  The default behavior is to email
notifications which is undesirable.

To address this problem Travis configuration settings are added to an active
branch.

Active branches are those that have recent activity when compared against the
following command:

    for k in `git branch -r |perl -pe s/^..//`
    do
      echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k|head -n 1`\\t$k;
    done | sort -r | grep origin

Which should produce output like:

    2013-01-06 00:03:10 -0800 14 hours ago  origin/master
    2012-12-27 09:50:20 -0800 10 days ago   origin/1.x
Merge pull request #111 from jeffmccune/feature/1.x/travis_active_branches

(maint) Add Travis CI support to active branches