Merge pull request #209 from Ian-Stewart-Binks/happstack

happstack: Remove sql directory (and courses.ddl).
Make region labels appear
Make arrow heads appear on graph
Colour nodes by research area
SVG Parsing: fix infinite recursion due to hybrid ids
SVG Parsing: fix infinite recursion due to hybrid ids
clay: fix styling of ellipses and nodes
clay: fix #199
Merge pull request #211 from david-yz-liu/happstack

Fix some styling issues
SVG Parsing: style changes
SVG Parsing: Remove IDE file
Merge pull request #212 from david-yz-liu/happstack

Fixing style
Merge branch 'happstack' of https://github.com/Courseography/courseography into happstack

Conflicts:
	utilities/svg_parsing/svg_parser.py