iwlist parser: Scan wireless access points available in Linux net

This class can be used to scan the wireless access points available to a Linux machine.

It can scan all available access points or just a given access point network interface.

It executes the iwlist command on the actual Linux machine to scan the wireless network and parses the command results to retrieve the information about network interfaces of the scanned access points in an associative array.

It can return the network interface name, IP address, ESSID, protocol, mode, channel, encryption key, bit rates, quality, signal level, etc..