update installation instruction in README

[konradb3]

There should be :
git clone --recursive git@github.com:jhu-lcsr-forks/orocos_toolchain.git src/orocos/orocos_toolchain
instead of
git clone --recursive git://gitorious.org/orocos-toolchain/orocos_toolchain.git src/orocos/orocos_toolchain

There are missing dependencies of rtt_ros_integration. There should be at least :

git clone git@github.com:jhu-lcsr-forks/rtt_ros_comm.git
git clone git@github.com:jhu-lcsr-forks/rtt_common_msgs.git

[jbohren]

There are missing dependencies of rtt_ros_integration. There should be at least :

git clone git@github.com:jhu-lcsr-forks/rtt_ros_comm.git
git clone git@github.com:jhu-lcsr-forks/rtt_common_msgs.git

Yeah, I've been considering whether the packages in rtt_ros_comm should be merged into this repo, and whether rtt_common_msgs should be merged or if anything depending on rtt_common_msgs be pulled out of it.