lup_rma. Spread rows of initial matrix across processes
Removed unnecessary printfs
Removed commented code

It was used in spreading of matrix A across processes.
Now we spread data using mpi remote memory access.
Now program can find global max_row and every process receives it.
Added test for LUP-algorithm, which uses RMA
Added lup_parallel_rma to Makefile
lup_parallel_rma works as expected

But all send, recv, bcast (not sure about bcast) operations must be
replaced with RMA operation (MPI_Win_*, MPI_Get)