Large refactoring work, cleaning up some arduino code
-created packages org.apparatus_templi.driver and org.apparatus_templi.event to hold drivers and events respectively.
-changed visibility of most methods in Driver & Coordinator to public instead of package private.

led_flash.ino, basic_remote_module.ino:
-incorporated changes from other sketches
-setup() now queries the Xbee for its serial number
-expects Xbee power to come from a specified pin

-added diagrams to wiki-images/