moves nodelet_manager into camera namespace
adds option of utilising the worker threads parameter for the nodelet manager
adds topic remappings to sort the versious nodelets i/o (i.e. depth, rgb etc.)
removes (assumed) duplicated depth nodelets include thereby removing service registration error
adds arguments for switching on/off each processing module
Merge pull request #3 from bit-pirate/new_namespacing

Allow proper usage of namespaces for openni's nodes and nodelets
1.9.1
fixing xyzrgb pointcloud generation when device registration is enabled
disabled unregistered depth and disparity processing when depth_registration is set to true
Merge pull request #4 from piyushk/fix_device_registered_cloud

Fix device registered point cloud generation
1.9.2
removes usage of arg depth_registration for processing modules (reverts https://github.com/ros-drivers/openni_launch/commit/cf357ef2f59f922e05207c594a40949885c6932e)