Update can run a generic git command.
Merge branch 'master' of github.com:substance/substance
Automatically create symlinks for npm deps.
Remove obsolete index file.
Fix regression.
Remove manually specified symlinks.
Use node layout for sub-modules.
Ignorance.
Fix regression.
Show test action duration.
Display error source
Styling.
Styling error messages.
Fix regressions.
Expose node_modules as lib/substance
Merge branch 'master' of github.com:substance/substance

Conflicts:
	src/controllers/sandbox_controller.js
Fix regression.
Merge branch 'master' of github.com:substance/substance
Lorem ipsum with some basic annotations.
Serve more informative result on errors in loading scripts.

The usual way would be to return an internal server error. Though, this
is handled really poor by the browser leaving no clue what really had happened.
This solution serves the stacktrace instead of the javascript source file.