add lmod and modify menu

docs.it4i/software/lmod.md

@@ -63,6 +63,7 @@ $ ml av
 ```
 
 In the current module naming scheme, each module name consists of two parts:
+
  * the part before the first /, corresponding to the software name; and
  * the remainder, corresponding to the software version, the compiler toolchain that was used to install the software, and a possible version suffix