Merge pull request #3 from UK-AS-HIVE/scott

Made chairDMusers optional in the Departments mongo collection
Add favicon
Load Gudea font from Google Fonts.
Correct name of 'notes' field in allocations schema, sort department names alphabetically, and remove code accidentally included from dropdead branch.
Made instructor details static with a togglable edit mode, similar to individual courses.
Merge branch 'scott' of https://github.com/UK-AS-HIVE/TRS into scott