Update config.project.mk

The addons cflags were missing in the new Makefile system.
ios es2 fixes.

- added depth buffer to ES2 renderer.
- added fsaa buffer to ES2 renderer.
- ES2 renderer now has the same features as ES1 renderer
- tested that both ES2 and ES1 renderer both behave the same.
- updated a couple examples so they use ofPushMatrix instead of
glPushMatrix which is not supported in ES2.
Merge pull request #2234 from julapy/ios-es2-fixes

ios es2 fixes.
ofGLUtils: GL_LUMINANCE(_ALPHA) are not supported in programmableGL, change them to GL_RED and GL_RG
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
ofGLUtils: fix 1 and 2 channels internalFormats for programmableGL
ofGLUtils: GL_R is not supported in GLES
programmableGL: add format swizzles method to ofTexture

and use it for uploading 1 and 2 channels pixels from ofImage,
ofVideoGrabber/Player
ofAppRunner: shutdown http properly to avoid crashes on exit. Fixes: #2177
linux compilePG.sh: change owner of obj folder in addons after compiling PG
ofMAterial: set material for FRONT and back in separate calls. Closes #1605
Merge pull request #2207 from fx-lange/patch-1

Update config.project.mk: PROJECT_ADDONS_CFLAGS missing
ofxGui: default to bitmapString + simplified drawing + methods to change font
ofBitmapFont: functions to get text mesh + texture
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
ofxGui: methods to allow changing default sizes and colors
Merge branch 'develop' into bugfix-ofXML

Conflicts:
	addons/ofxGui/src/ofxBaseGui.h
Merge branch 'bugfix-ofXML' of github.com:arturoc/openFrameworks into bugfix-ofXML
gui examples: remove ofxXmlSettings from addons.make