Add a simple script to calculate basic numbers on NEMO releases
code comm(ratio) total release-3.4/NEMOGCM/NEMO/LIM_SRC_2 6358 1975(23,7%) 8333 release-3.4/NEMOGCM/NEMO/LIM_SRC_3 13015 4019(23,5%) 17034 release-3.4/NEMOGCM/NEMO/NST_SRC 2071 358(14,7%) 2429 release-3.4/NEMOGCM/NEMO/OFF_SRC 1967 588(23,0%) 2555 release-3.4/NEMOGCM/NEMO/OPA_SRC 96005 29926(23,7%) 125931 release-3.4/NEMOGCM/NEMO/OPATAM_SRC 37209 12706(25,4%) 49915 release-3.4/NEMOGCM/NEMO/TOP_SRC 20111 5932(22,7%) 26043 total 176736 55504(23,8%) 232240 release-3.6/NEMOGCM/NEMO/LIM_SRC_2 6552 1991(23,3%) 8543 release-3.6/NEMOGCM/NEMO/LIM_SRC_3 11200 3631(24,4%) 14831 release-3.6/NEMOGCM/NEMO/NST_SRC 4408 1091(19,8%) 5499 release-3.6/NEMOGCM/NEMO/OFF_SRC 2037 593(22,5%) 2630 release-3.6/NEMOGCM/NEMO/OOO_SRC 4495 945(17,3%) 5440 release-3.6/NEMOGCM/NEMO/OPA_SRC 113711 33269(22,6%) 146980 release-3.6/NEMOGCM/NEMO/SAS_SRC 1855 659(26,2%) 2514 release-3.6/NEMOGCM/NEMO/TOP_SRC 22371 6823(23,3%) 29194 total 166629 49002(22,7%) 215631 release-4.0/src/ICE 13721 4951(26,5%) 18672 release-4.0/src/NST 5565 1537(21,6%) 7102 release-4.0/src/OCE 96572 29102(23,1%) 125674 release-4.0/src/OFF 1285 399(23,6%) 1684 release-4.0/src/SAO 2530 464(15,4%) 2994 release-4.0/src/SAS 1805 606(25,1%) 2411 release-4.0/src/TOP 24789 7690(23,6%) 32479 total 146267 44749(23,4%) 191016