loadSafetyParams loads safety parameters for a group from disk (XML)
 
    More information on the safety parameter XML format can be found at:
    https://github.com/HebiRobotics/hebi-xml/blob/master/SAFETY.md
 
    This method loads parameters from a human readable file into a
    SafetyParamsStruct.
 
    Example
       % Create a test XML file with empty safety parameters
       xmlFile = HebiUtils.saveSafetyParams(SafetyParamsStruct(), 'MySafetyParams');
 
       % Load those safety parameters back from the XML file
       safetyParams = HebiUtils.loadSafetyParams(xmlFile);