Changing way to get infos, now using ffi callback solution to assign to
value attr. of new type named MutableInt.
Changing FFFile structure to simple OFile pointer to FILE, filename and delete
methods were useless. Updating part which were using it.
Adding some refactoring.
Removing useless blank.
Updating download sample program.
Adding new way to manage cURL callback, introducing callbacks in curl
class.
Removing all useless code previously used for cURL callbacks.
Adding new type CURLCallbackType defined by an enum, to be used in C as
well.
Removing behavior in progress (mail, post, put), because of new
callbacks.
Adding method in OFile to write to file, now used by stream_callback in
nit curl class.
Setting some functions private.
Adding Makefile.
Renamnig get, dl samples.