update readme a bit

Author: Vadim Nazarov

Diff for: README.md

@@ -212,10 +212,16 @@ asdasd
 
 ### Model files
 
-### Gene segments files
+#### Main JSON file
+
+#### Gene segments files
+
+#### Event probability files
 
 ### Cloneset files
 
+#### Available parsers
+
 > Reminder: run `python3 pyymir.py -f` to view all available formats and their aliases.
 
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