first hg2 helpers
incorporate hg2 into wrapper
Merge branch 'master' of https://github.com/plotly/MATLAB-api
update plotlyhelp
first area hg2 dev
add updateArea
change ishg2 to isHG2
ishg2 -> isHG2
first updateBar, updateArea, extractBarMarker
delete repeated bar gap code
add updateBar
Merge branch 'master' of https://github.com/plotly/MATLAB-api into hg2updates

Conflicts:
	plotly/plotly_help_aux/plotly_reference.mat
fix check for 3D
remove overloaded area
fixed updateArea with colour + line specs
first extractAreaLine and extractAreaFace
first updateQuiver, updateErrorbar
fix scatter multiple child check
change any to is empty - to handle objects in new hG2
add HG2 catch for legends and colorers