Merge pull request #57 from mabalaski/master

Further updated Markus' sections
Added use case diagram

Use case diagram added, missing the functional requirement
numbers, colin and I will add it later, please take a look as
some of you will be writing summaries for all of the use cases
in this diagram
Update usefulLinks.md

Please check your section of the document.
Added template for Deliverable 5 work
Finished revision history for Project Spec