Correct date label on project information page

The label "Created at" would be appropriate for a timestamp such
as "09:30".

However the timestamp is actually being displayed as a date in
the format "Oct 15, 2013".  In this case "Created on" is better.
Remove "is" from labels
Capitalise "Awesome" in placeholder text
Merge pull request #5359 from dpursehouse/update-some-labels

Minor grammatical updates in some of the labels.