added scrollwheel support for GLFW

implemented scroll events based on the already provided scroll_cb in
ofAppGLFWWindow.cpp
fixed inconsistent indentation
deleted subproject in devApps
update to oscpack 1.1.0
changes to reenable broadcast and reuse.
changes to allow for setting max udp buffer size win and nix compatible.
windows max buffersize changes.
changes to set the old 4098 buffersize if non-specified
Merge branch 'oscpack' of github.com:openframeworks/openFrameworks into oscpack
addon_config and small unsigned int fix
ofxCvColorImage -> unsigned char* to ofPixels
update CHANGELOG
fix ofGet/SetBackgroundColor, replaces #1401

ofSetBackgroundColor has never worked properly, this fixes it
ofGetBackground is deprecated for ofGetBackgroundColor
ofBgColor removed completely, this will break old code but was really wrong
ofbBgClear removed for ofGetBackgroundAuto

also renderers now have to implement:

	startRender
	endRender

and windows need to call it in display.

windows don't need to set anymore the vieport, clear the bg...
now the renderers do that instead, before the window had to ask
the renderer if it had to clear the background and with which
color which was mixing the responsabilities of both classes and where
that info was stored
ofBitmapFont: fix x,y position for generated mesh
Merge branch 'master' into bugfix-ofGet/SetBackgroundColor
ofThread android: fix warning
Merge branch 'feature-scrollwheel-support' of https://github.com/fakob/openFrameworks into feature-scroll

Conflicts:
	libs/openFrameworks/app/ofAppRunner.cpp
	libs/openFrameworks/events/ofEvents.h
scroll event to float
fixes for ofDrawGridPlane, ofDrawGrid

+ fixes issue where central axis would not be drawn when non-integer tick count specified
+ fixes ofDrawGrid API to specify stepSize and numberOfSteps rather than scale, tickNumber
+ ensures numberOfSteps be a positive integer
changelog update