build.sh and fixes

Created build.sh. Creates templates using nicify.pl and copies them to $THEOS/templates/iphone/.
Removed \`const\` modifier from global strings in flipswitch_switch/Switch.xm.
Renamed activator_event's preferences label.
Renamed activator_event/Tweak.xm to activator_event/Event.xm. Reordered code and added sharedInstance to act as the datasource.
Added sharedInstance to act as the listener and made minor modifications to activator_listener/Listener.xm