Update README to reflect new function

README.md

@@ -2,7 +2,8 @@
 
 # utf8encoder
 Two simple functions to encode and decode UTF-8 from/to its Unicode code
-points using bitwise operators.
+points using bitwise operators. A third function to get the size of a
+UTF-8 character from its first byte.
 
 The Makefile is for Linux, however the code itself should compile on any
 platform.
@@ -11,27 +12,6 @@ platform.
 
 The header file is in `./include/utf8encoder.h`.
 
-```c
-/**
- * Encodes a single UTF-8 code point into its binary representation.
- * Fills the `size` argument with the size.
- * `size` will be set to `0` on fail.
- * @param codePoint The code point (e.g. the 0xAE49 in U+AE49).
- * @param size      Where to copy the number of bytes the encoded code
- *                  point uses, or `NULL`.
- * @return The encoded binary, ranging from using 1 to all 4 bytes.
- */
-uint32_t utf8Encode(uint64_t codePoint, size_t *size);
-
-/**
- * Decodes a single UTF-8 encoded character into its code point.
- * An error occurred if `binary` was not `0` and this function returns `0`.
- * @param binary The UTF-8 encoded byte character.
- * @return The code point of the UTF-8 encoded character.
- */
-uint64_t utf8Decode(uint32_t binary);
-```
-
 ## Building
 
 Build the shared object: