PR #784: Merged in startup and docs for Nu shell

Author: Robert McLay

README.new

@@ -252,4 +252,5 @@ Lmod 8.7+
             * Issue #704: Support for nushell command generation added.            
             * Added conversion from old tm format to new with l_convertOldtm(tm) in src/MRC.lua
             * Issue #778: Only quit searching when there is no entry in v.dirT (in collectFileA())
+            * PR #784: merged in startup and docs for nushell.