Since LuaJIT does not follow the typical "./configure && make && make test"
pattern, this custom .travis.yml will run "make && sudo make install" on the
Travis-CI runner VM every time a pull request or push is made to the
repository, once this commit is merged.
We can use Travis-CI for continuous integration as needed. Notification
settings can be adjusted in this file as well to have Travis-CI email the
mailing list when a push breaks the build, etc.
