added support for dynamic cast, etc.
Merge branch 'master' into dyncast
aded a proper ../src/libraries/icubmod/embObjLib/IethResource.h file, cleaned function names in FeatureInterface, etc.
enhanced print in TheEthManager::getHandle() if a handle cannot be found
Merge branch 'master' into dyncast
added missing kff parameter to Darmstadt and Sheffield
Prepare debugStream for merging into YARP

* Rename classes and move them in yarp::os namespace
* Import Log.h from YARP and mark current debug functions as deprecated
* Add yInfo()
* Add c-style functions
* Fix colors
* Fix build
* Cleanup
* Add a very small test