Added member valiable to represent torque control mode
Comment TwoDofControllerInterface functions
Added getParameters method to controller classes
Moved motor_model_type to MotorTorqueController and implemented updateControllerParam to MotorController
Added setTorqueControllerParam service to update torque controller parameters
Pass t_param as reference in setTorqueControllerParam
Added const to setTorqueControllerParam argument and debug comments
Updated debug message and debugged type miss in updateTorqueControllerParam
Modified controller arguments from double valiables to struct parameter.
Added old style parameter functions to TwoDofController for Stabilizer
Added default constructor to controllers
Merge pull request #339 from orikuma/torque-parameter-dynamic-set

Add parameter setting interface for TorqueController