ofAppiOSWindow::Settings

- ofAppiOSWindow can now be initiated with a Settings object (same as
in ofFbo::Settings)
- updated all examples to show how settings can be used.
fixed type in ofxiOSConstants file name.
Fixed addVertexes should be addVertices
Merge pull request #3294 from mrbichel/patch-1

addVertexes should be addVertices
Closes #3297
Merge branch 'master' of github.com:openframeworks/openFrameworks
Add camera begin()/end() documentation.
Move ofCamera destructor implementation to .cpp.
Remove duplicated documentation from implementation, fix spacing.
ofEasyCam documentation.
Merge pull request #3298 from bakercp/feature-documentation

Continued Camera documentation.
Closes #3299
Merge branch 'master' of github.com:openframeworks/openFrameworks
Updating axis on matrix change
Making updateAxis protected member
Removing extra updateAxis() calls
Merge pull request #3300 from procedural/ofnode-fix

Updating axis on matrix change
Update ofNode.cpp

ofNode: setPosition doesn't need to call updateAxis
Fix for issue #2860
Merge pull request #3302 from procedural/of3dutils-fix

Fix for issue #2860