OF modular - Lite when needed

[dimitre]

Meant for some users only. This was planned other times before and I'm proposing something simple.
Motivation: we can reduce compiling time when not using the entire project. A smaller binary can be a faster submission to app store too.

related discussion:
https://forum.openframeworks.cc/t/bundling-osx-app-without-glut-and-without-fmodex-nasty/23503/4

my first suggestion is we can use a variable in Project.xcconfig to have fmod enabled as default, like:

OF_USE_LIB_FMOD = YES

So I can edit the second build phases script and put an if inside (already tested)

if [ "$OF_USE_LIB_FMOD" == "YES" ] ; then
echo "\033[32;1;4mUsing libfmod\033[0m"
rsync -aved "$OF_PATH/libs/fmod/lib/osx/libfmod.dylib" "$TARGET_BUILD_DIR/$PRODUCT_NAME.app/Contents/Frameworks/";
else
echo "\033[31;1;4mNot using libfmod\033[0m"
fi

this way we can stop including certain libraries if desired
related ideas:

• Proposal : ofGraphicsCairo.h - cairo functions outside ofGraphics.h #6947
• Proposal: Different #define handling in ofMain.h #6948