* when nmeas < nsave, nstore is not incremented from run to run and exactly the same random numbers will be used from run to run
* also, trajectory_counter is normally initialized to 1 but it was set to 0 if initialstorecounter was set to "readin" but
no .nstore_counter file was present, this commit makes the two self-consistent
Merge pull request #257 from kostrzewa/seed_xor_trajcounter

fix for random seed XOR and initialization of trajectory_counter