fixed the way arrows are displayed : not at the center of the fragment anymore but at the beginning
builds number up to 573
Merge branch 'feature125' into dev
Fixed the way arrows are displayed : not at the center of the fragment anymore but at the beginning.
added various debug messages
cpplint-ed the code, fixed minor problems
Merge branch 'feature126' into dev
Added various debug messages, cpplint-ed the code.