Adding two basic Cuda-C programs named 'hello0' and 'hello1'.

Which print a 'Hello world' message.

Set CMake scripts for compilation and to generate a doxygen documentation.

	new file:   CMakeLists.txt
	new file:   doc/CMakeLists.txt
	new file:   doc/doxygen.config.in
	new file:   src/CMakeLists.txt
	new file:   src/hello0.cu
	new file:   src/hello1.cu
Adding theivim back-up files to the '.gitignore' file.

	modified:   .gitignore
Removing helping message from the CMake script.

	modified:   src/CMakeLists.txt
Changing the project title and the input template.

From now only cuda source files located in the 'src' directory will
be processed to generate doxydoc.

	modified:   doc/doxygen.config.in
Adding a new basic CUDA example, *sum of 2 integers*.

	new file:   src/add0.cu
Adding a new BASIC CUDA example: addition of 2 integer vector.

One element addition per block.

	modified:   src/CMakeLists.txt
	new file:   src/add_block.cu