FORMUS3IC_LAS3 / embb

Fixed warning 4456 in doc\examples\mtapi/mtapi_cpp_wait_task-snippet.h (declaration of 'status' hides previous local declaration)

dataflow_cpp: removed Network::Make for simpler usage, added Network:IsValid to check network for errors
tutorial: adapted to reflect changes to dataflow_cpp
examples: adapted to reflect changes to dataflow_cpp

This reverts commit 40624201.

Fixed doxygen warning, "." was ignored. Verified, that image is still contained correctly in build documentation.

Build opencl module, examples and tests only if opencl is available in the build environment. Tested with environment, not having opencl installed.

This reverts commit fca2298d.

We used customized header, for toggling the bullets on the API view only up to level 2. However, turned out, that this header is only compatible with this doxygen version. We should be independent of the doxygen version, therefore removed this approach again. Has to be discussed.

tutorial: Added paragraph to MTAPI C++ description regarding the performance impact of automatic initialization, references added in the algorithms and dataflow tutorials, added note to readme