Fix offsets in text rendering, release freetype resources on error and
switch themes.

Store active layer in font settings and cache tools

Store tool selection state in tool collection

White space fixes

Apply OTF substitution in kerning tab

Faster overview

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

Tab specific key bindings

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

Spacing classes
Update side bearings and all kerning pairs for one or more glyphs
at the same time.

scroll tool box

split tool box in tools for drawing and tools for drawing