Add travis-ci setup file.
Get travis-ci working.
Choose compilers for travis-ci.
Add library dependencies to travis.
Add library dependencies to travis.
Add library dependencies to travis.
Add library dependencies to travis.
Add library dependencies to travis.
Reduce travis dependencies for travis.
Reduce travis dependencies for travis.
Reduce travis dependencies for travis.
Don't build examples for travis testing.
Is apt-get update necessary?
Yes, apt-get update is necessary, for now.
Delete whitespace.
Do not build visualizer in travis.
Merge pull request #25 from chrisdembia/travistesting

Automated testing using Travis-CI. 
Chris is helping me get the Travis build going ...