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

Merge ../birdfont-2.x

HiDPI for label tools

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

Merge branch '2.15'

Add a box for short help texts

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

Speed optimizations for the overview tab

This is done by caching labels and creating an array that stores the
length entire lenght of the set at all unicode ranges in GlyphRange.

The current version runs in a single thread but some work has been done
in order to render overview glyphs in a background thread.

White space fixes

Tools for inserting glyphs in the spacing tab

Update labels in background tab

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

Color picker

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

Conflicts:
	install.py

Drag and drop layers

Layer label

Speed optimizations in toolbox

Toolbox label

Merge ../birdfont-android/birdfont

Hide zoom tool on Android

Theme selection label in file tools

High contrast theme

Bright and dark themes

Fix selection in overview

New color theme