fixed a grave bug where nullfilters were not working correctly
added missing dependency
MUX simplified by using a 8-connected null filters
DeMUX has a specialization for message type (uses ros::Subscriber internally by default)
Added rosdep for nodelet (uuid)
Added Ubuntu platform tags to manifest
fixed the tools (broken, did not compile)
removed the transport for now
moving topic tools out of nodelet proper, removing rospy and message_filters dependencies from nodelet