added helpmsg for strength command

main.py

@@ -23,6 +23,7 @@ USAGES = {
 \n        'label' = optional name for the password \
 \n        'charset' = characters that can be in the password (use '-<characters>' to exclude a list of characters))\
 ",
+        "strength": "strength <password/label> - Evaluates the strength of a password, or if a label is provided then that password.",
         "echo": "echo <string content> ( 'string_content' = any text to be echoed )",
         "dbg": "dbg ( Prints a debug output of the manager's state )",
         "list": "list [ <label> <password> ](Prints the passwords currently stored 'label' = the password you want to decrypt)",