Dokan Ada bindings 2.0

Dokan is a Windows 32- and 64-bit user-space file system, similar to FUSE.
Dokan is implemented in in C/C++.
The driver routes the I/O requests to the file system device to the library callback.

Changes to the Dokan Ada bindings :

• The code and the Ada API was reworked to accommodate the Dokan major version 2.