Removed mapping2, merged good stuff from mapping3 to mpping, removed obsolete or questionable stuff from mapping, revised the sd2indx - the output is now in different format - this is intentional so we could find and fix its usage in different places, added testing for the new sd2indx function

Author: alexvakimov

src/libra_py/workflows/nbra/__init__.py

@@ -13,8 +13,6 @@
            "decoherence_times",
            "lz",
            "mapping",
-           "mapping2",
-           "mapping3",
            "ml_map",
            "plotting",
            "qsh",