Important bug: the constant to convert rotational velocities was wrong. The actual rotational speed did not correspond to the desired rotational speed.

[tibi_dabo_head_node]
  - xml changes

[hre_random_node]
  - updating to new hri changes

[hrengagement_node]
  - adding remmpaing for hri

  - removing exception throwing for checksum error

[segway_rmp200_node]
[segway_monitor]
  - fixing bugs to allow multiple opens
  - adding dynamic reconfigure restrictions: if serial does not exist, tries auto-connect

  - moving joy.msg from joy to sensor_msgs

[segway_rmp_200]
[segway_rmp_200_node]
  - removing open function from constructor

  - trying to fix open/close transitions

Modified the main CMakeLists.txt to set the compiler flags for the C++ compiler instead of the C compiler.
Solved some compilation warnings that appeared.

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