The new codelet is added for all 3 runtimes but only tested with starpu ;-)
An example test7 is added : it is a copy of test6 that uses the new function to build the matrices

Fix a large bunch of warnings, and there are still mistakes that should be fixed before the SC release

At the user levl, we wait for a sequence. We need to add a MORSE_Barrier function that waits for all sequences currently running

instead of introducing RUNTIME_distributed_barrier

MORSE_Desc_Create_User with NULL pointer cannot be used to allocate the data (mat) - when NULL is given to MORSE_Desc_Create_User means that the application manage the allocation - to let MORSE allocate its data -> use MORSE_Desc_Create with NULL pointer

change copyright - correct whitespace - place cmake module depending on chameleon in cmake_modules and no more in cmake_modules/morse