Cells whose entire SSID is a substring of others weren't usable.

For example if there were two networks Apple and App, it was impossible
to connect to App.
Added support for WEP.

I'm not sure the best way to figure out that a network is a WEP network
and not a different type of encrypted network, but maybe it just works
this way.
raw_input was renamed input in Python 3
Cells whose entire SSID is a substring of others weren't usable.

For example if there were two networks Apple and App, it was impossible
to connect to App.
Added tests for the iwlist parsing
Merge branch 'wep_support'

Conflicts:
	bin/wifi
Clean up some documentation
Version 0.2.0