add bom service definitions in messages
Changed all TODO and @TODO to @todo to conform to doxygen.
Added RungeKutta to the helper classes and changed the odometry to use that instead. Also created PaintboardControl files, changed the Makefile to compile all control classes and deleted Cliffsensor control becase it did not work.
wrote metal detector class and messages. Untested.
Added a reset() function to EncodersControl. Untested.
Added messages/services I forgot to add earlier.
Changed cliff_status_changed to a singe int8 bitmask
Retired (deleted) unused packages.
Moved their msg/srv definitions to the messages/ package instead, and revised the libscout and scoutsim files that depended on those namespaces.
Changed Odometry to publish a ScoutPosition message with the scoutname, x, y, and theta.
Removed bom.cpp, bom.h, get_bom_reading.srv, and query_sonar.srv
Removed them for real this time; not pretend
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