AAT morx Insertion marking

[behdad]

fontkit/src/aat/AATMorxProcessor.js

Line 237 in c00b10f

if (entry.flags & SET_MARK) {

I'm fairly sure the marking should be moved after actions are performed. Don't have test font to prove it though. Something that @brawer can produce a test for eventually.

[brawer]

Added test case MORX-30 for multiple AAT glyph insertion without re-setting the mark. Fontkit seems to enter an infinite loop while executing the test.