fix stroke size while basic.Rect scaled in IE
fix typo (Queen) in Chess plugin.
linkView: fix IE9 hidden arrowheads bug
add user event test utility
Make selection select objects not by their x,y but by their box intersection with selection area
core.js: add clamp util function
move normalizeEvent() to joint.util
fix chrome's illegal access exception on pointerup in joint.dia.Paper
DirectedGraph: accept dagre edge and node config via JointJS elements