Various issues fixing. WARNING: co-occurence, chartsearch pages still buggy

Updated Roxy to latest master release
Finally added loading gif image
Various fixes for recent searchcontext changes in test pages
fix in Kratu widget when being used with searchcontext (true/false as
results)
v7 detetion bug fixes in Core API
removed replaceAll dependency in widgets.js
Fixed XHR2 XML success response handling
Updated installextensions.sh for version extension