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

Merge pull request #132 from boen1977/wrncleanup

Remove compiler warnings: `GLib.Thread.create'

Fix misc compiler warning.

Fix build

Fix code for loading TTF and OTF fonts

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

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

Rename text rendering directory

Fix fontconfig issues connected to sandboxing

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

Create fontconfig cache in a background thread

Use Roboto as the default font for the application

Load fallback fonts with fontconfig