[pthread,OpenMP,MPI] Parallelized loops.

  1.c was solved via pthread since there
was no interiterational dependencies at all.

  2.c has true dependency: first write
an element and then use it.

  launch.sh - performs two kind of tests:

* run parallel and ordinary versions and
compare outputs;

* run parallel verson for 2, 4, ... 2^k
processes one time for each number and
calculate the acceleration.