Add DBS counter pixel. Closes #199
Updated spin.js to 1.2.8
Handle request for non-existing search (closes #195)
Removed not longer needed search_result model
Fix sem app popover (closes #194)
made cache=nocache work again
Redirect to searches_url not to root_url.
Removed haml and replaced help by slim version (ruby-prof output showed marginal penalty when haml gem is loaded, even in non-haml views)
Made google books support use HTTPI instead of HTTParty (which is known to be very slow)
Use curb instead of httpclient as HTTPI backend (should speed up every HTTPI based http operation)
Added initializer for httpi so logging (in median and the catalog) can be controlled there
Updated jquery and jquery-ui to latest version, fixed some minor jquery 1.9 incompatibilites concerning .live
Moved external assets below vendor/assets and removed asset gems
Renamed selectpicker.js to bootstrap-select.js as in the original repo, added notes to README
Added missing semicolon in application.css.scss
Removed markaby
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