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
Add specs for NotificationsHelper
Reduce usage of bold font
Separate partial for project home page dropdown
Redesign project home page
New block buttons css
Improve git clone panel
Update git-clone js. Use new style on wiki git access too
Make clone links looks related to clone bar
Increase project home page margins
Render right clone panel partial on empty project page
Fix test
Show both Private and Public labels on project show page
Merge branch 'improve/ui' of /home/git/repositories/gitlab/gitlabhq
Merge pull request #5385 from tsigo/notification-helper-spec

Add specs for NotificationsHelper
better align for project#home
Add tip to see difference between old and new config
Merge pull request #5359 from dpursehouse/update-some-labels

Minor grammatical updates in some of the labels.