Fix compile time warnings

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

Fix TTF clipping on Windows

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

Display error message when a glyph has too many points

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

Create SVG table in OpenType fonts

Don't put overview glyphs in cache
The cache does become large and it slows down rendering.

Set decender value to bottom margin for the font

Old vertical metrics code

Fix errors in cmap subtable 4

White space fixes

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

Use webfont values for decender and ascender in TTF fonts

Don't set ulUnicodeRange on Mac

Don't set CJK bits on Mac (ulUnicideRange in OS2 table)

Generate Mac specific TTF fonts
This should fix the fontbook issue

Generate mac specific truetype fonts

Add abstract table class

This commit adds a new library for parsing XML files
The library is much smaller in size than libxml2 and it is easy to
use in vala. It parses tags and attributes but does not attempt to
validate namespaces.

Fix compile time error

Correct ascender and decender in OS2 table

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.

Convert horizontal lines to the new coordinate system
This commit does also add code that removes objects without an area before
exporting TTF fonts.