fix parsing of datetime and time element values
log connection closed events
better handle connection aborts
fix string encoding errors in UIDs
display UID if abstract syntax is unknown
catch null reference exceptions if connection is aborted
fix extraction of embedded overlays in transcoder
use number keys to change window/level calculation method in dump utility
use H key to show/hide overlays in dump utility
handle min/max calculation of solid black images
account for padding in histogram calculation
update changelog
ExtractOverlays should return new dataset if changes are required
W/L calculation methods now work with compressed images
fix overflow in histogram calculation
Merge Remote-tracking branch 'upstream/master'