Move scanning code into NetworkManager rather than use iwlib's
	iw_scan() function, so that we can figure out AP capabilities.

	* NetworkManager.h
		- Add AP capability bits

	* src/NetworkManagerAP.[ch]
		- Add capability field to NMAccessPoint structure
		- Add WPA & RSN Information Element fields and accessor
			functions to NMAccessPoint

	* src/NetworkManagerDevice.c
		- Remove usage of iw_scan
		- Add scanning code to NetworkManager rather than use
			iw_scan() from iwlib

	* src/NetworkManagerUtils.[ch]
		- (nm_dispose_scan_results): remove, unused


git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@1023 4912f4e0-d625-0410-9fb7-b9a5a253dbdc