Split the package

This MR splits the package:

1. ntfs-3g - the FUSE driver itself.
2. ntfsprogs - userspace utilities.
3. libntfs-3g - a shared library for the former packages to depend on.

This allows us to use the userspace utilities independently from the FUSE driver. E.g. in conjunction with ntfs3 kernel driver.

Replaces !2 (closed). Closes #2.