rtt_roscomm: renamed source files and libraries related to ROS services with rtt_rosservice prefix
rtt_roscomm: added singleton pattern to the ROSServiceRegistryService service
rtt_roscomm: link rtt_rosservice to rtt_rosservice_registry target
rtt_roscomm: separated typekit pkg template from source file templates required to build the typekit
Also the typekits and service proxies will be built in a separate subdirectory now and do not influence the scope of the caller.
Merge pull request #5 from meyerj/rtt_roscomm-template-refactoring

rtt_roscomm: separated typekit pkg template from source file templates required to build the typekit