We already have the convenient degrees() and radians() functions to convert
between angle formats. This commit involves a lot of refactoring here and
there and I may have missed some places where conversions were needed. But
hopefully there aren’t may such places.

The old public API is maintained for now but should be considered
deprecated.

The containers no longer force the user to use the ptrdiff_t type for
size information. For convenience, size() now always returns an int,
and the size_s() method offers a way to handle arrays with more than
2 billion elements. Internally, we still use ptrdiff_t, though.

Since so much code had to be changed, I took the opportunity to get
rid of capitalised accessors for classes that are lowercase.

Scene rendering logic is now better

Reworked Primitive logic for scene rendering
FileUpdateTester works now .....

Added palette in Scene.

Added tile cam index to have tileset available with other 3d stuff ..... 2014 is now !