- Adds more `const` in getters
- Overriden methods have the `override` keyword
- Reorganizes the structure of the class:
# creators first, then constructor, destructors, init
# then overridden methods
# variables at the end
- removes Hungarian notation from parts of the code
... instead of sharedXXX / purgeXXX.
They are more C++ friendly, and also easier to remember.
common files + Mac files + iOS files + tests/samples files were updated.
The old methods are deprecated now.