help installing pcl on ROS Indigo

I'm currently trying to install the point cloud library so I can use it's RANSAC features for sphere detection. There seem to be lots of tutorials about using the PCL with ros but I can't find anything about how to install it. I've been following the answer to this ros answer: http://answers.ros.org/question/201516/installing-pcl-for-ros-indigo/ I've added the dependency to my package.xml file so it now looks like this sme_awareness0.0.1Package of Lidar and Camera awareness toolspete blackerTODOhttp://www.PeteBlacker.compete blackermessage_generationmessage_runtimecatkinpcllibpcl-all-devroscpprospystd_msgssensor_msgsgeometry_msgstftf2tf2_rosimage_transportcv_bridgedp_ptu47_msgspcllibpcl-all-devroscpprospystd_msgssensor_msgsgeometry_msgstftf2tf2_rosimage_transportcv_bridgedp_ptu47_msgs However when I execute the command: rosdep install --from-paths src --ignore-src --rosdistro indigo -y I get the error: ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: sme_awareness: Cannot locate rosdep definition for [pcl] Can anyone help me get this up and running? Thanks.