Fixed issue where 'follow' incorrectly displays & fixed #136

List of changes : 

1. Fixed an issue where the 'Follow' tag would incorrectly display in the current users' page.
2. Fixed a minor issue with toolbar hover.
3. Fixed issue #136 (added a tooltip showing image name).
4. Added the same tooltip to the image preview page.

I am having trouble deploying GlitterGallery on OpenShift right now. I'll try to add a link in my next commit :)