Remove information about the length of the array in markhor_hardware_interface
Fix drives front left and rear left that had incorrect direction in their configuration
Although this is weird, since logically the rear right drive should have this issue also. My guess is that the drive configuration most of be wrong in some way
This was fix in the code since I was too lazy to check in the configuration
Fix that the rear_left drive was using the front_right value
Fix that all the drives were using the same value in the Set function (I don't know how that got there)
Add a markhor_base launch file to ease the debug sequence