Fix a performance issue connected to multimasters

Merge 2.14 with master

More multimaster code

Generate outline for new masters from stroked paths

Self interpolation

Create versions of glyphs in order to support multi-master fonts

Create masters in glyph collections

White space fixes

Generate stylistic alternates and fix PostScript names

Skew selected glyphs in overview

Fix spacing class bug
Don't update spacing classes when new glyphs are created.

Fix text rendering

Fix memory leak

Remove debug info

Debug memory leak

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

Reorganize unassigned glyphs

Add ligatures

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

Copy glyphs from overview to clipboard

Copy and paste glyphs in overview tab

Generate a font from several SVG files
This commit add a new command that lets you import a set of SVG files to
an existing font or generate a new font from the command line.

Undo deleting glyphs in overview tab

Use the version list for deleting glyphs from the font

Fix memory leaks