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

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

Merge ../birdfont-2.x

Update labels when new parts are created from background images

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

Merge branch '2.15'

Fix background image selection

Fix scrollbas in file dialog tab and update image selection expander

Store tool selection state in tool collection

Fix background tools selection

White space fixes

Update image selection when background tab is selected

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

Filter file dialogs based on file extension

Update labels in background tab

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

Conflicts:
	install.py

Layer label

Show version and build time stamp in GUI

Speed optimizations in toolbox

Separate theme tab

Set visibility for new background images

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

Tab specific key bindings

Kerning strings
This commit adds code that lets the user load a list of strings for kerning.
The list and the position in the list is specific for each font.

Set rsb and lsb values from text input in spacing tab