add reference to squid-in-a-can to docs. fixes #95
add reference to squid-in-a-can to docs. fixes #95

ruffsl/ros_buildfarm,ros-infrastructure/ros_buildfarm,ruffsl/ros_buildfarm,mistoll/ros_buildfarm,mistoll/ros_buildfarm,ros-infrastructure/ros_buildfarm,mistoll/ros_buildfarm,ros-infrastructure/ros_buildfarm,ruffsl/ros_buildfarm