Set hostname and wireless info on first boot

[johnnyman727]

The hostname of the Tessel should be set to the serial number of the SAMD21 upon first boot. In addition, we'll want to set our own network and wireless files within /etc/config/network and /etc.config/wireless.

[johnnyman727]

This is partially fixed by setting the hostname to Tessel-MACADDR. We still need to set the default network and wireless configuration.

[johnnyman727]

Temporary workaround - get shell access on the device, then modify /etc/config/wireless with

config wifi-device  radio0
    option type     mac80211
    option channel  11
    option hwmode    11g
    option path    '10180000.wmac'
    option htmode    HT20

config wifi-iface
    option device   radio0
    option network  lan
    option mode     sta
    option ssid     {THE SSID YOU WANT TO USE}
    option encryption psk2
    option key { THE PASSWORD FOR THE NETWORK }

Then edit /etc/config/network with:

config interface 'loopback'
    option ifname 'lo'
    option proto 'static'
    option ipaddr '127.0.0.1'
    option netmask '255.0.0.0'

config globals 'globals'
    option ula_prefix 'fd87:e99f:34ad::/48'

config interface 'lan'
    option ifname 'wlan0'
    option proto 'dhcp'

config switch 'mt7620'
    option enable_vlan 0

Then run the following shell command:

/etc/init.d/network restart

[johnnyman727]

Will be fixed when #14 lands.

[kevinmehall]

Landed