replicated xacro for m16ib20 with a different name
modified arm_group instances to 'm16i20b' instead of 'manipulator'
renamed launch files for the m16ib20 arm, arm_group parameter was modified to 'm16ib20'
added arm navigation package for fanuc arm m16ib20
renamed/removed launch files for m16ib20 arm accordingly
removed all references to mtconnect_arm_navigation package, since this will be replaced by the mtconnect_m16ib20_arm_navigation package
replaces launch file that runs the arm through a predefined path
removed mtconnect_arm_navigation package, it has now been replaced by mtconnect_m16ib20_arm_navigation