Use the minified JS files.
Merge .gitignore files to the repo root.
Update dependencies.
Should fix a couple of the generate_data.sh warnings.
bower.json: sort deps by name.
Update main.css.

* switch to class
* change selectors order; put tags on top
Move inline style to main.css and remove inherited property.

Also simplify a couple of shorthands.
main.css: Remove unused selectors.
Make use of Bootstrap's `pull-right` and `pull-left` classes.

Also merge conditionals and fix indentation.
Remove relative URL.
Losslessly compress images.
Use Font Awesome icons instead of PNG files.
Fix validation errors.

Switch to a `ul` for the navbar items.