Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x

Merge ../birdfont-2.x

Fix spacing classes

White space fixes

Rename XML namespace

Fix memory leak

Debug memory leak

Don't interpolate hidden points in stroke

Align tool box icons

Change orientation icon to reflect the current orientation

Export kerning pairs from kerning classes
Fixes bug 79

Merge branch 'master' of https://github.com/johanmattssonm/birdfont into HEAD

Don't generate empty kern list in GPOS table

Update kerning when kerning classes are updated

Thread safety in text rendering

Merge branch 'master' of gitorious.org:birdfont/birdfont

Conflicts:
	libbirdfont/BirdFontFile.vala

Fix carret position in text area

Move spacing data to font class

Fix kerning for ligatures

Add unassigned glyphs (ligatures) to ttf fonts and kerning tab.

Merge branch 'master' of gitorious.org:birdfont/birdfont

Replace libxml2 with libbirdxml
This commit does also remove the deprecated ffi support. BirdFont 1.4
or older can be used to convert ffi files to the new bf font format.

Merge branch 'master' of gitorious.org:birdfont/birdfont

Fix kerning for divis and ampersand