Removed color styles that are project-specific

The background on the filter and the coloring of the text was not
universal
Changes to the fixed navbar top

1. Added a block for the navbar classes, so we can choose the classes
to use on the site-base (navbar-fixed-top, navbar-static-top,
navbar-inverse, navbar-default…)

2. Added js to the eultheme.js to dynamically add padding to the top of
the body if the navbar is fixed. This will account for reflowing
navbars and eliminates the need to set a fixed padding.