Adding CMake config file for OCL

This cmake config file allows people to treat OCL like a single package
with subcomponents, which is how it is really set up. This works in a
similar manner to the way the RTT cmake config file works.
fixing doc
removing REQUIRED from ocl cmake config file components
remvoing variable from old RTT config
Merge pull request #3 from jhu-lcsr-forks/add-orocos-cmake-config

Adding CMake config file for OCL