Changes to network script

 - Dropped link speed
 - Added multiple address support
 - Added IPv6 support

I want to allow the user to scroll through the addresses or use other mechanics to rotate through each address. I just don't know what would be the most correct way to do this (exporting a variable just feels wrong). Ideas?

Calculating the level and signal for any interface might not be relevant. If an interface is wireless, you have a `wireless` directory in its sysfs directory:
````
$ ls -d /sys/class/net/{wlp3s0,enp0s25}/wireless
ls: cannot access /sys/class/net/enp0s25/wireless: No such file or directory
/sys/class/net/wlp3s0/wireless/
````