Different logging for plugins

WOLF_DEBUG was designed to print only if compiled in "debug" mode. This was before splitting the library in plugins. Now, since this macros are defined in core, all WOLF_DEBUGs in whichever plugin prints depending on core compilation mode.

However, if I am working in a plugin, I may want to display the WOLF_DEBUG of my plugin but not the ones for the rest of the plugins. And also, I may want not to recompile core in "debug".

It would be very useful to activate/deactivate the WOLF_DEBUG of each plugin depending on the compilation mode of the corresponding plugin. I don't know how much difficult would it be, I assume it is not trivial.