"starting adding graph capability"
added graph area, scrollable, not curve yet
Ticks with scrolling
added tick labels
moved the graph creation to another function
more work on tick labels (tspan are preallocated, etc.)
x and y ticks now in same object
ticks now stay in box; tick labels stay on correct side of axis
added basic zooming
more zooming capability
graph curve nicely ; better scaling of tick label font
For performance, scaling is not anymore inside the SVG 'transform'
fixed bug due to previous change with zoom scaling
Attemps to make a automatic plot limits - failed for now
some more failed attempts for auto limits
another attempt, closer to success but bugs remaining
Merge branch 'graph' of https://github.com/mccoys/calc into graph
now auto limits start to work
fixed bug with parentheses when graphing: 1/(1+x) would be interpreted as 1/(1)+x
Merge branch 'graph'

Conflicts:
	calc.html