Fix bower issues.

I have fixed two issues which prevented the project to work on a fresh install on my machine:

- npm doesn't know a bower version `1.9.2`, I am not sure where this came from? I have set it to ~1.3.0, which is the current version.
- The scripts expect the bower dependencies to be installed in ./bower_components but the current bower version defaults to `app/bower_components`. Install path is now set in `.bowerrc` file.