Adding logAxis to line charts (positive or negative range)
Added logAxis to Bubble charts.
Merge master
Adjusted initial log changes to deal with bars

Outstanding:
Negative Axes not rendering
Crossed Axes not rendering
Haven't Tested 2nd X and Y, Color or Z Axis Logs.
Remove a line of test code
Fixed for negative axes
Altered default min and max

changed default to base ^ -1 instead of hard coded 0.1