bind defaultShader in setup() for RPi/GLProgrammable

This fixes an issue in the Programmable GL Renderer where RPi would not have the default shader bound when a drawing call was issued in update().

Fixes issue #2593

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
fixes a speed issue with programmable gl and ofDrawAxis()

this addresses issue #2607

Is there a more elegant way to keep a static version of the axis vbo around?

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
applies size parameter upon axis mesh creation

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
change cachedAxisVbo to singleton =)

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
further cleanup

uses cleaner syntax for cachedAxisVbo.

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
ofGstUtils: use uint 64 for time return types
projectGenerator old: osx, add support for CFLAGS, LDFLAGS and absolute paths
old PG: ignore commented lines in addons.make
update projectGeneratorSimple submodule to latest commit
Closes #2615
updated CHANGELOG
ofCairoRenderer: fix moveTo
ofxNetwork - Check for aborted connections on windows

On windows when a client doesn't disconnect cleanly winsock throws the WSAECONNABORTED error. This provides another way to determine if the connection is gone. This causes a lot of headaches when working with ofxMostPixelsEver.
ofxNetwork - read receive timeout from m_dwTimeoutReceive not m_dwTimeoutSend
refactored updates to network disconnection detection
Assign allocated flag to true after allocating offscreenGWorldPixels. fixes #2220
Merge pull request #2628 from igierard/master

ofxNetwork - small bug fixes with ofxNetwork
android: fix reload textures
Merge branch 'master' of github.com:openframeworks/openFrameworks
update to heap-allocated axes mesh

* made cached axes heap-allocated following @arturoc's advice
* fixed typo (correct plural of axis is 'axes')
* added brief doxygen description

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>