Continue processing packet if mindelta is undefined
Add library font preference.

* Add font selector to the preferences.
* Move row height preference from Interface to Library.
* Add controls for changing the font size:
  - [Library],font_size_increment
  - [Library],font_size_decrement
  - [Library],font_size_knob

If the row height is smaller than the font-size the larger of the two is
used.
LateNight: remove font tweaks

Conflicts:
	res/skins/LateNight/style.qss
Support loading fonts from res/fonts.
Package fonts in res/fonts.
Add OpenSans to res/fonts.
Switch Deere to Open Sans.

Reduced all point sizes by 1. Not sure why but Open Sans renders a tiny
bit larger?
Review notes.
Remove schema.xml from NSIS.
Merge pull request #406 from decklin/hid-allow-no-min-delta

[HID] Continue processing packet if mindelta is undefined
Deere skin: Use <Invert/> instead <Not/> transformer for the mixers quick effect mute button. Makes more readable that we invert the original behavior. <Not/> still used wherever we toggle visibility of widgets with <BindProperty>
Merge split sentences in tooltips that previously lead to translation errors.
Update translation template. Found 1886 source text(s) (26 new and 1860 already existing). Kept 5 obsolete entries
Merge pull request #422 from rryan/font

Add library font preference.
Don't track "steady pitch" values while user is reversing the track
Update dlgcontrollerlearning.h

Added feature control for HID.
Merge pull request #433 from kwhat/master

Update dlgcontrollerlearning.h
Merge branch 'master' into vinyl-reverse-fix
remove debug line
Quit the Library Scanner event loop properly on shutdown.

We were accidentally only quitting when a scan was in progress.