add OSIROI volume accessors
Merge remote-tracking branch 'upstream/develop' into develop
ROI: NSCache instead of NSMutableDictionary
MD-280
WebServer: use &#39; instead of &apos; for IE8 compatibility
MD-281
MD-282
MD-283
MD-281
More aggressive compression for JPEG
MD-285
MD-284
WADO Retrieve: default concurrent from 50 to 10
MD-288

WADO Retrieve: Start retrieving before C-FIND ends
MD-288
Plugin SDK fixes
MD-294
MD-288
MD-294
Merge remote-tracking branch 'upstream/develop' into develop