Run bower update before building the GLClient with grunt
Merge branch 'master' of github.com:globaleaks/GlobaLeaks into feature/dependency-management

* 'master' of github.com:globaleaks/GlobaLeaks:
  fixed a bug in stresser.py
Also install bower in the build-testing-package script
Merge pull request #554 from globaleaks/feature/dependency-management

Feature/dependency management