Update ofImage.cpp

fixing typos
Merge pull request #2327 from danthemellowman/patch-6

Update ofImage.cpp
Update visualstudio.md
adds ofEnable/DisableAntiAliasing that works at runtime
fixes enableAntialiasing -> enableAntiAliasing in several renderers
Fix unbalanced parentheses in ofLog calls.
Merge pull request #2328 from arturoc/feature-antialiasingruntime

adds ofEnable/DisableAntiAliasing that works at runtime
xmlExamples: disable antialiasing to make lines look better. Closes #2323
Merge pull request #2329 from bilderbuchi/oflog-fixes

Fix unbalanced parentheses in ofLog calls.
remove duplicated GPUparticleSystemExample. Closes #2330
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
ofAppRunner and windows: getters for native windows and gl contexts
fix logging errors
ofAppBaseWindow: missing default implm for getGLXContext
Merge pull request #2194 from LeoColomb/Fix-VS2012-Doc

Update Visual Studio guide for v2012
scripts linux: don't compile OF and the PG from install_dependencies
Merge branch 'develop' of github.com:openframeworks/openFrameworks into develop
make native window / context getters virtual
restore OF app key focus after dismissing dialogs
remove unnecessary __OBJC__ check in ofAppRunner