added xls code
erased commented out code
removed xls.html view out of users
added link to xls export
changed rake version in Gemfile.lock
add send volunteer invitation button to events#show
generate dynamic email based on the number of positions left to fill
remove extra line
refactor email subject and related tests
merge master with resolved conflicts
refactor tests
resolve conflicts
add flash notices for invitations button
refactored header
Merge pull request #10 from epicodus/xls_printout

Xls printout
Merge pull request #11 from epicodus/profile_page

Profile page
Update Readme
Merge pull request #9 from epicodus/mailer

Mailer
update assignment abilites for each type of user
resolve conflicts