- Remove trailing semicolons. They're not needed in shell scripts
- Don't create default XDG_DATA_HOME (<HOME>/.local/share) the code
should work equally well if that directory doesn't exist and so
not creating it tests another part of the code
Currently, there is an ubuntu 14.04 and archlinux build and they both
use cmake with ninja, cmake with make, and autotools to build. It should
be straightforward to add another configuration.
Travis checks out the correct branch of the source code for us, and we
expose that source code to the docker container using a docker run
"volume".
