limit partners logo width on small devices
fix display bugs

* visible footer
* auto height for header message
* minimum height (500px) for bigmap
* remove useless bigmap-noauth.css
* a in signup bar
* rss in toolbar
* put signup bar in the map container
* minimum height (700px) for bigmap on small devices
use minified version of bootstrap-datepicker
csslint
remove useless slimbox files
use minified version of html5shiv
remove useless bootstrap-theme.min.css
upgrade spin.min.js
upgrade bootstrap to 3.1.1
upgrade jquery to 1.11.0
upgrade blueimp-gallery