This feature was in previous release, but broken. This update uses
standard, faster bounding box calculation for simple shapes when angle
is multiple of 90.
Updated tests. Fixed two tests that were broken in Safari.
canvas.getStrokedBBox internals refactored to svgutils.
getStrokedBBox/getCheckedBBox renamed to
svgedit.utilities.getBBoxWithTransform
Removed duplicate calls to native getBBox.
Refactored slow transformed BBox from temporary DOM append/remove to
matrix calculations.
Lots of tests. Added qunit/qunit-assert-close.js.