Namespace in ReflexHand and Motor

[OAkyildiz]

• Instead of assuming a slash is preceding the name, left out the preceding '/'s.
• left a commented out line that allows removing the '/' if there is one.
  self.name=name[1:] if name[0]= '/' else name
• Introduced back 'name' as an argument to enable naming individual hands. ->updated reflex_sf.hand accordingly.
• Namespace configurations through roslaunch now works

[OAkyildiz]

main body if the urdf is now a macro that takes in parent limk name, tf_prefix and an origin block if the arg attached is set true

[herambnemlekar]

zero_point calibration values must be restored or kept to prevent the merge conflict

[OAkyildiz]

Restored the original zero points