White space fixes

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

Convert control points with zero length handles to lines
This solves a problem with the Beziér tool when the designer uses a grid to
create paths.

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

Lock for blocking background process

Store font size in kerning display

Fix previous zoom view

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

Experimental optimization of toolbox

Redraw less

Set visibility for new background images

File buttons in tool box

More  colors

New color theme

Fix zoom bar width

Customizable color theme

Fix compiler warnings

Update scroll bar when content size changes

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

Conflicts:
	libbirdfont/BirdFontFile.vala

Don't redraw from the background thread

Display a background image to the empty tool box

Settings tab

Add a zoom bar