Added note about limitations

README.md

@@ -55,6 +55,10 @@ Four Demos are provided for your assistance...
 * QREncoderVCL - A VCL Demo showing an encoder with a high level of customization.
 * QREncoderFMX - An FMX Demo Showing an encoder with a high leverl of customization.
 
+## Known Limitations
+
+The only supported encodings right now are Numeric, AlphaNumeric and Byte. Kanji and other advanced encodings are not yet supported.  Full unicode support is supported by most readers via reading Byte encoding as UTF8.  When you assign a string that does not qualify as Numeric or AlphaNumeric, UTF8 is used and stored as byte encoding.
+
 
 > Copyright (c) 2019 by Jason Southwell
 >