Change 'class' parameter name to prevent conflict with c++ reserved word

[eyeswideopen]

The parameter names in the core files named 'class' should be renamed, as this is a reserved name in C++, which makes it impossible to include the project in ObjC++ files/projects.

Example of current function sugnature:

- (void)registerAdClass:(Class)class;

should better be:

- (void)registerAdClass:(Class)someDifferentName;

by the way: great work, even though i haven't been able to test it yet;)