home/main files
Merge pull request #23 from sadasilva/master

home/main files
Merge pull request #24 from andy2013march/master

Moved files from src to backend folder, added sequence diagram, and modified some files
Changes to classes Event, SubEvent, and Task.
Merge pull request #25 from KettyLezama/master

Changes to classes Event, SubEvent and Task.
got setter methods working. expanding test eviroment
added setUID functionality
Moved Email.java to BackEnd folder