before copying DP RAM to MM RAM;
-Changed the RAM block from cr_cw to crw_cw to allow overwrite on the
MM side (via Python);
-Added option to tb_mmp_st_histogram to introduce inconsistent
(long,short,long,short,...) sync intervals such as is the case in LOFAR.
-tb_mmp_st_histogram now shows errors due to the inconsistent sync
interval.