Closes issue #1005.

- added support for the new Tigris bug tracker in the main website
- added basic documentation about how to develop and test new bug trackers
Updated the docs for writing new training missions
Fixed profile_hourly_tasks.py
CSS tweaks and more editable fields for bugsets
Add sketchy flake8-ify script for bugsets
Fix outdated Skills test on AnnotatedBug
Merge pull request #306 from ehashman/master

Add sketchy flake8-ify script for bugsets
Add security test
Turn off inplaceedit in production, fixing hole
Merge pull request #305 from ehashman/issue995

[issue995] CSS tweaks and more editable fields for bugsets
Merge branch 'master' into issue1020

Conflicts:
	mysite/bugsets/perms.py
	mysite/bugsets/tests.py
Merge pull request #307 from ehashman/issue1020

[issue1020] Fix the django-inplaceedit security hole in production
Delete confusing and superfluous text
Rename list -> main, listview -> list
Add create view
Merge pull request #302 from eeshangarg/bug-1019-updated-docs-for-writing-training-missions

Updated the docs for writing new training missions
Merge pull request #308 from ehashman/issue1003

[issue1003] Add create view for bug set creator
Improve style for create and main pages, add create form
UI for adding a project
Remove version 1.4.13 of Django