Add missing functions from 3.3

[pavanky]

• scatter
• scatter3
• set_visibility
• alloc_host
• free_host
• alloc_device
• free_device
• alloc_pinned
• free_pinned
• use lock_array instead of lock_device_ptr
• use unlock_array instead of unlock_device_ptr
• is_image_io_available
• transform_coordinates
• create_strided_array
• get_strides
• get_offset
• get_raw_ptr
• is_linear
• is_owner
• is_lapack_available
• get_active_backend
• get_device_id
• get_revision

New defines:

• AF_ERR_DEVICE