gemfile: add strict versioning information
css: improved footer
footer: add link to blog
carousel: make more responsive
change site title

This should probably be the root user's own 'name' field to make it more
modular, but we hardcode it for now.
login button: darken on focus as well
carousel: fix horizontal position of hand icons
more specific <title> tag
css: major site facelift

The oldest 'bug' that was fixed was that we now added a simple
'.vert-spacer' div, to get around the fact that using 'position:
relative' for the hand glyphicons in the carousel broke their 'top: 66%'
value in Chromium. By manually adding in a blank element and setting its
height, we can avoid CSS hackery completely.