White space fixes

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

Use webfont values for decender and ascender in TTF fonts

Spelling

Set units per em in export settings

Add abstract table class

Add code page and Unicode range values in OS2 table

This commits adds code for a legacy feature that still is used
by Microsoft Works and probably many other Windows applications
like Microsoft Word.

Birdfont will set the corresponding bit for a Unicode
range if there is at least one character in that range in the font.
Bits for code pages will be set if there is at least one character
other than the default characters.

Improved TTF generation, character width, gasp table etc.

Fix creation and modification time in TTF fonts

Draw outline of paths by tracking mouse movements
This commits adds a new pen tool that lets the user draw shapes on free
hand in contrast to the pencil tool.

Efficient parsing of the kern table

touchpad scrolling in toolbox

1024 unts per em and a tool for moving points

TTF grid
Use 1000 units per em

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

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

take ascender value from bounding box

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

4096 units per em

adjust margin in over view

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

mac issues, including a more permissive license for libbirdfont

tie quadratic handles

Subdirectory for open font format tools