This patch will allow developers and team members to view the output of building 0 A.D. using multiple compilers and versions. In it's present form, this patch will perform test-builds of 0 A.D. on Ubuntu trusty using gcc 4.8, 5, 6, 7, and 8; clang 5 and 6; osx High Sierra (not yet working).
Once this patch is merged into the svn repo, any time the GitHub repo is updated with new code from svn, the Travis test will be triggered for the latest code.