fix working dir and db setup for travis (#2133)
for travis, log to /tmp
travis: storage, cache, logs, static all under /tmp (#2133)
travis: ensure /tmp/* dirs are created first (#2133)
travis: fix shell typo (#2133)
travis: fix another setup.sh typo (#2133)
travis config cwd for test matters (#2133)
travis: try installing google-chrome-stable (#2133)
travis: apt-get as root for goog-chrome-stable (#2133)
travis: disable selenium tests (#2133)
Merge pull request #2266 from Stanford-Online/sef-2133-travis

Get travis working for Class2Go