Use promise support in mocha.

Change-Id: I6cfbd72554467669582e5d82a01a22c8565c2bcd
Use SVG badges.

Change-Id: I73d5a28e74b18f486a5d6c031a11efa7946145ee
Make travis more patient.

The bundler can be slow; emit verbose output to ensure that builds
don't time out prematurely.

Change-Id: I966f6c21ec28591374a86b6d2f89ada47a498a8d
Experiment to see why travis is hanging.

Change-Id: I8f69e6d4ea93edaee0170dcde92ad0bbd7fdd83a