contrib: drop libiwinfo, moved to OpenWrt trunk
libiwinfo: major changes - move own headers to include/iwinfo/ and shipped ones to include/iwinfo/api/ - split into libiwinfo and libiwinfo-lua which contains only the binding - provide a public api for libiwinfo - install development headers and shared objects
libiwinfo: move duplicated coded into iwinfo_utils.[ch]
libiwinfo: support txpwrlist(), freqlist() and countrylist() for radioX pseudodevices in nl80211 backend, implement __gc methamethod
[libiwinfo] apply FD_CLOEXEC on internal ioctl and netlink sockets
[contrib] introduce libiwinfo, splitted apart from LuCI for general usage - added NL80211 interface for b43 / ath5k / ath9k - introduces txpower() and encryption() methods - introduces iwinfo cli frontend for data access - supports scanning in AP mode (experimental) and through wpa_supplicant