handle status code 1223 that IE uses for empty responses with 204
Merge pull request #225 from bartvde/uploader-ie9fix

handle status code 1223 that IE uses for empty responses with 204
make sure GetCapabilities XML is refreshed and not taken from browser cache in IE when the user changes see boundlessgeo/suite/issues/256
Merge pull request #226 from bartvde/issue-256

make sure GetCapabilities XML is refreshed