Example Angluar module meant for template use.

We should take advantage of Angular's module system for code
organization. The project can be split into page/route modules. This is
an example module to be used a template for converting the rest of the
application into a properly modularized Angular app.
Convert 'flash' and 'installed' provider to module

Since flash and installed providers are used by other modules across the
application, they are placed into the modules/common/ directory.

This commit is meant as an example of a trivial conversion of existing
components to modules. Note that these new modules haven't actually been
hooked up, that will be done in the next commit.
Convert Installer to module.

First full fledged example of converting a page/route in the application
into it's own self contained module. Note that this module declares all
its depedencies. Ideally, the root module shouldn't need to declare any
dependencies.

Note that an unfortunately side effect is that every module has to be
individually included in index.html. Perhaps a build system might be
helpful for this. Also updated bootstrap to latest (3.1.1).

The original installer was split into two html files. I've merged them
into one since the two separate pages doesn't seem necessary.

There's a backend issue where the installer doesn't work because the
database wasn't created.
Small fixes.

os.access() returns boolean anyways.

settings.py shouldn't use root account to access database.

Remove TODO for convenience when grepping.