WidgetGroup backpaths should be tiled, not stretched.
Merge branch 'master' into skin-tiled-backpath
Implement selectable tile or stretch rendering.
Implement tiling SVG by pre-rendering
implement mode="" attribute for all widgets that support BackPath
Refactor much of the backpath draw mode logic
Merge pull request #178 from ywwg/skin-tiled-backpath

Skin tiled backpath
Remove developer_skins submodule.
Add res/developer_skins to .gitignore.
Change backpath attribute name from mode to scalemode
Add attribute to status lights to optionally not setfixedsize
Since nearly all legacy skins configure sliders to emit on release, default
sliders to EMIT_ON_PRESS_AND_RELEASE.
Re-add WBaseWidget::setControlParameterDown/Up.
Remove left-button event tag from knob and slider mouse input.
Fix typo in VAMP developer plugin path for 64-bit Linux.
Fix spelling of auxiliary.
Merge remote-tracking branch 'upstream/master' into wpushbutton_default

Conflicts:
	src/widget/knobeventhandler.h
	src/widget/wslidercomposed.cpp
removed emmitting left right connections from setControlParameterUp, becasue this might results in confliction values from the original left right connection
set default emmit options in WSliderComposed::setup() to ensure that values are emmited during slider move
Set default emit option for WOverview, this fixes seeking via position slider.
Allow a EMIT_ON_RELEASE slider which does not change during mouse move
Fixed scrolling at sliders in emit on relese mode