Start using URITemplates in the classes
Tests pass. Fixtures updated to a degree.
Stricter requirements
Merge branch 'develop' into uritemplate

Conflicts:
	setup.py
Ternaries are awesome!
Lint!
Start adding templates to Repository objects
Add more templates to Repository

Add to the documentation for each what can be used for expansion.
Covered all the exisiting templates on repos
Update Users URITemplates and their docs

Also add a few non-template URLs to Gist objects.
Make underlying template object slightly more obvious

Add a `t` to the end of templated objects
Add templates to issues
Forgot the trailing t
Add url to issue comment
Add template and urls to Team
Add template and urls to Organization
Add missing attributes to PullRequest
Update history and requirements.txt