restore ofxOpenALSoundPlayer and SoundEngine for iOS
add example for instanced vboMesh drawing

This demonstrates how to use ofVboMesh::drawInstanced() using the programmable GL renderer and a matching shader.

It will draw 16384 instances of an ofBox primitive, spreading these out on a grid, extruding their height on the vertex shader using a depth texture, and animating along the x-axis, to make it a little more interesting.

Plenty of comments inline.

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
Merge pull request #2365 from tgfrerer/feature-vboMeshDrawInstancedExample

Feature vbo mesh draw instanced example
ofLog: fix level initialization
ofGstUtils: fix uninitialized value
guard cwd restore to win32-only (from "not android")
closes #2337
Merge pull request #2368 from admsyn/bugfix-datapath-warnings

guard cwd restore to win32-only (from "not android")
osx makefile: conditionally use gstreamer
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
ofFbo: removed unneded code for calulating tex_u/t, now done in ofTexture. Closes #2369
Merge pull request #2363 from admsyn/feature-restore-ofxopenalsoundplayer

Restore ofxOpenALSoundPlayer for iOS
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
bugfix for non-filled svg paths being closed closes #2364
Merge pull request #2371 from openframeworks/bugfix-svgClosedPath

bugfix for non-filled svg paths being closed closes #2364
Merge branch 'develop' of https://github.com/openframeworks/openFrameworks.git into develop