Add wpa_unquote function

This function can be used to unquote WPA supplicant config file strings
returned from wpa_cli calls.
Rewrite of netctl-auto

This adds a command line interface to the netctl-auto script to
allow users more control over the automatic profile selection.
Add man page for netctl-auto(1)
More consistent quoting in netctl-auto
Rework some lines in netctl-auto
Fix references related to netctl-auto(1)
Use iproute2 for bridging (FS#36165)

This sheds the dependency on the old bridge-utils (brctl).
Merge branch 'master' of git://github.com/gandro/netctl into gandro-master
Make netctl-auto more hook friendly

The hooks (including any interface hook)  are loaded each time a wpa
event occurs. This means the auto.action script can be extended in the
hooks. For this purpose, several exported variables (mainly $ACTION)
can be checked for their value. The name of the active profile is not
exported, but still available (just as in ordinary netctl usage) through
the $Profile variable.

Profiles ending in .action are disallowed (reserved for possible future
use). Both ifplugd and wpa_actiond have a notion of 'action script'.