Added `user_admin.html` page.

I didn't add the updated submodule reference for ijit in this pull request since I want to wait until the latest pull request is merged into master before I do.
Merge pull request #22 from agrc/user-admin

Created user admin widget.
Upgraded dojo submodule to 1.9.1 to match esri 3.7.
Removed bootstrap import.

It breaks the build. It's loaded in index.html for now.
Ignored bootstrap and jquery in dist.
Fixed build. Closes #23.
Merge branch 'build'

* build:
  Fixed build. Closes #23.
  Ignored bootstrap and jquery in dist.
  Removed bootstrap import.
  Upgraded dojo submodule to 1.9.1 to match esri 3.7.

Conflicts:
	src/user_admin.html