dot support for strand. make block starts relative
revise bed12 logic and switch to block iterator.  also keep output sorted by source coordinates
add error when inbed < outbed version
clear ouput set
futher fixes to bed12 logic and general bugs.  note some couts still there
add warning message if auto detect of bed version could be due to error
fix target bed line sort to prioritize strand last
make sure blocks get cleared
remove couts
Merge remote-tracking branch 'origin/development' into liftover