Added a configure_ap.sh to automate building AP mode

This script only works on Debian Wheezy with the 3.8.13-bone50 kernel.
It 1) Installs kernel headers 2) builds and attaches the RTL8192cu driver to the kernel 3) Builds hostapd from source 4) Configures the wlan0 interface with a static ip 4) Configures hostapd to configure wlan0 to behave as an access point 5) Install and configures dnsmasq