* gnomevfs/Makefile.am:
* gnomevfs/ModuleCallback.cs:
* gnomevfs/ModuleCallbackAuthentication.cs:
* gnomevfs/ModuleCallbackFullAuthentication.cs:
* gnomevfs/Vfs.cs: Use a custom VfsException for Result errors.
* gnomevfs/VfsException.cs: new custom Exception class.
* sample/gnomevfs/Makefile.am:
* sample/gnomevfs/TestCallback.cs:
Implement custom bindings for the ModuleCallback mechanism. Atm, only
the GNOME_VFS_MODULE_CALLBACK_AUTHENTICATION and
GNOME_VFS_MODULE_CALLBACK_FULL_AUTHENTICATION callbacks are implemented.
Also added a test-case using the full authentication callback (tested
using the sftp: method). [Partially fixes#70602]
svn path=/trunk/gtk-sharp/; revision=37972
