Added option to leave the page
Few changes in leave project code
Added condition to check for owner of the project
added an extra line between routes
Merge branch 'master' into develop
modifed participant_id to user_id
modified participant to user
Merge branch 'master' into develop
added url_for in models, modified url_for in templates, views are pending
working on url_for
added url_for in views
fixed conflicts
fixed email sending bug
Revert "added url_for in views"

This reverts commit fb3bb5fb4d6d9effe70688b414af8af2aba77506.
Revert "fixed email sending bug"

This reverts commit 3c96672284ddae4bba244b7c99c21051e6959a57.