recognition: recognizeMove function was extracted
recognition: a bit of refactoring
model: first connections were introduced (#12)

Figure::recalculate() and Model::recalculate() were introduced
PBoundedFigure was added in model.h
Segment::a,b were made protected
SegmentConnection : Segment was introduced, constructed of two
  PBoundedFigure
recognition: recognizeMove --> recognizeGrabs; connection gesture was added (#12)