Client tests

[jrief]

No description provided.

[rfleschenberg]

It "mostly" works, but Karma isn't able to start a browser on travis:

28 07 2016 14:33:24.545:INFO [karma]: Karma v0.13.22 server started at http://localhost:9090/
28 07 2016 14:33:24.552:INFO [launcher]: Starting browser Firefox
28 07 2016 14:33:24.874:ERROR [launcher]: Cannot start Firefox

28 07 2016 14:33:24.878:INFO [launcher]: Trying to start Firefox again (1/2).
28 07 2016 14:33:24.899:ERROR [launcher]: Cannot start Firefox

28 07 2016 14:33:24.901:INFO [launcher]: Trying to start Firefox again (2/2).
28 07 2016 14:33:24.921:ERROR [launcher]: Cannot start Firefox

28 07 2016 14:33:24.922:ERROR [launcher]: Firefox failed 2 times (cannot start). Giving up.

Possibly related?
karma-runner/karma#856
http://stackoverflow.com/questions/19420994/karma-cannot-start-firefox

[adrienbrunet]

What is the status of this PR? Do we need to fix it or it's not needed anymore?