Travis ci integration

This request contains configuration data for travis-ci.org. Travis-ci is a continuous build system which is integrated into github (i.e. it'll tell you if unmerged pending pull requests will break the build if they're merged in).

If this patch is acceptable, the owner of the adaptivecomputing/torque repository needs to login to http://travis-ci.org/ and turn the repository "on" using the settings page before future commits will be automatically built on travis-ci.org.

After the master branch is working with continuous integration, it might be a good idea to continuously build other branches as well (via the .travis.yml file).