Update README.md

README.md

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 # exl_ValueToName
 A single cell formula to convert integer values to English text name
 
-Does NOT use VBA or any other packages. This is a primary design requirement. Any pull requests that violate this fundamental design requirement will be automatically rejected without comment.
+## Requirements
+
+1. Does NOT use VBA or any other packages/marcos; stands alone
+2. Single input
+3. Has no other precedents
+4. Translates to standard English phraseology
+
+## Limitations 
+
+1. Positive Integers
+2. Current Range 1 to 999,999,999,999