Crouton fixes. Fixed random blink of images due to network delays

Crouton in PublicationInfoFragment now shows with appropriate top margin accounting for action bar.
By default we assume there are no images, and thus image view pager is not being shown. When the first step of image retrieval completes and we know for sure that there are images to show - photo view is made visible and height is recomputed.
Closes #42. Added vote information to event after vote.
Added small person icon near number of votes for publication
Closes #43.

Added necessary DB columns for saving rating information. Publication vote result is saved. When a subsequent vote is issued, the same cookie is used to update an existing vote rather then submit a new one.