prefix versions of gazebo and transmission macros
fixed copy&paste error (?)
patched gazebo.urdf.xacro to be compatible with gazebo 1.5
removed arm_ prefix from joint names in gazebo controller config
fixed name of ur5 transmissions
Merge branch 'gazebo_fix'

Conflicts:
	ur_description/urdf/ur10.gazebo.xacro
	ur_description/urdf/ur10.urdf.xacro