Merge pull request #40 from ethanhugg/travis1

Added apt-get lines to travis.yml
Fix warnings on OSX compile
Updated contributors file
Merge pull request #42 from ethanhugg/cosmetic

Updated contributors file
Merge pull request #43 from ethanhugg/travis1

Add make test to Travis
Merge pull request #41 from fluffy/cj1

Fix compile warnings on OSX compile