add an LRU cache to the REST store, cache the results of fetches
obey Cache-Control: no-cache and/or Pragma: no-cache response headers in remotebinaryfile.js
make REST data store obey no-cache headers
Merge remote-tracking branch 'origin/maint/1.9.x' into combination_track
improved error message for HTTP errors when getting NCList features
Modified combination track error handling behaviour