A prototype of the Bundle/Worksheet system running locally
add census data
run all worksheets, fix typo
added documentation to controller
updated .gitignore
fixed settings and manage errors
Added bundle model to core models
adjusted view
added bundle run model
Merge branch 'master' into jcarden

Conflicts:
	.gitignore
	codalab/apps/web/admin.py
	codalab/apps/web/models.py
	codalab/apps/web/views.py
	codalab/manage.py
Updating for pull request
conflicts resolved
Merge pull request #3 from codalab/jcarden

Bundle and Bundle Run models