Merge pull request #117 from wlbehr/contributors

Update contributors page
Allow users to add extra email addresses in user edit page
update jquery to include trash icon for added emails
Update javascript to pass all additional emails under one form value
Update users controller and application.js to properly package and parse multiple emails
Add AdditionalEmails model and data table
Rename additional_emails db to the proper, singular additional_email
renamed AdditionalEmails to singular AdditionalEmail model
Create additional_emails on user update
Add functionality to add and delete additional emails
Update ability file to allow users to add email aliliases...the previous commit only permitted admins
Update invitation.rb to search additionalemail datdatabase to find user accounts
Add basic tests for AdditionalEmail model
Update edit form page and improve additional email deletion
Add integration tests for creating additional emails
Create a .gitattributes file to establish a default for line endings across platforms and machines
Update render argument to rails shorshorthand. Long form is being deprecrated
Update additional email tests to check database changes and refresh line endings
Add functionality to press enter and add a new email from the additional email input field
Update AdditionalEmail form to keep emails in place instead of appending them to the table