added site-scripts
added site-scripts to install
fixed build.sh
Specify the drivers to use with wpa_supplicant.

With the new version (2.2) this is apparently needed.
Added -k switch to curl so it doesn't complain about downloading the key.
Modified scripts so that the 'site-scripts' directory is copied to the system.
Merge branch 'master' into sitedebug
Added installation of raspi-scripts, including cron job to check for updates.