Added Email Class

JavaMail API needs to be pointed to in Netbeans
Placed all my files in the BackEnd folder
home/main files
Merge pull request #23 from sadasilva/master

home/main files
Placed EmailAddressNonExistentException.java on backend folder
removed my files from default package
Modified Participant and PhoneNumber and added Sequence Diagram
Merge pull request #24 from andy2013march/master

Moved files from src to backend folder, added sequence diagram, and modified some files
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
Created the correct table with seveal more fields. User class updated to include a way of updating all fields.
Update README.md

Made this thing actually helpful.
removed temp files and responsibilities text
Merge pull request #26 from jkuk/master

Reorganized some stuff
added 3 new folders for organization
Merge pull request #27 from jkuk/master

Reorganized folders
fixed a package error.
Merge branch 'master' of https://github.com/MassBayCS225/EMS