Modified nao_tactile node to search for a free port.
Removed hard-coded ports from nao_sensors_cpp and nao_speech.py
Added missing dependency on diagnostics in nao_driver cmake lists.
Merge pull request #31 from jondy276/fixed-missing-diagnostics-dependency

Added missing dependency on diagnostics in nao_driver cmake lists.
Merge pull request #30 from jondy276/nao_tactile_default_port

Modified nao_tactile node to search for a free port.