Add an initial travis CI configuration file.

The snapshots are old, from back before we had the src internally (and just
had snapshot jars).  We don't really use snapshots anymore.
On Jul 9, 2014 12:22 PM, "Christian Edward Gruber" <notifications@github.com>
wrote:

> In .travis.yml:
>
> > +
> > +install:
> > +  - ${INSTALL}
> > +
> > +script:
> > +  - ${CMD}
> > +
> > +notifications:
> > +  email:
> > +    recipients:
> > +      - google-guice-dev+ci@googlegroups.com
> > +
> > +branches:
> > +  only:
> > +    - master
> > +    - /.*release.*/
>
> I saw a snapshot set of branches, and wanted to allow us to have those
> CI'ed, and when I am releasing I tend to make a release branch to work on
> and I wanted that CI'ed
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/google/guice/pull/812/files#r14719550>.
>