update readme, realized i made a mistake in copy()

README.md

@@ -1,4 +1,6 @@
 # SYNOPSIS
+A little sugar on top of `uv_buf_t`. This should get moved out to
+another module called `nodeuv-buffer`.
 
 # USAGE
 
@@ -19,8 +21,36 @@ Buffer buf(10);
 # API
 
 ## CONSTRUCTOR
+Various ways to construct a buffer.
+
+### Buffer buf();
+### Buffer buf(size);
+### Buffer buf(string data);
+### Buffer buf(char* data);
 
 ## INSTANCE METHODS
 
-## STATIC METHODS
+### `string` buf.toString();
+Convert the buffer to a string.
+
+### `int` buf.length();
+The length of the buffer.
+
+### `void` buf.copy(Buffer targetBuf[, int targetStart][, int sourceStart][, int sourceEnd]);
+Copy a buffer into another one.
+
+- `targetBuf` a buffer to copy from.
+- `targetStart` an optional `int`, defaults to `0`.
+- `sourceStart` an optional `int`, defaults to `0`.
+- `sourceEnd` an optional `int`, defaults to the srouce buffer's length.
+
+Copies data from a region of this buffer to a region in the target buffer
+even if the target memory region overlaps with the source. If undefined
+the targetStart and sourceStart parameters default to 0 while sourceEnd 
+defaults to the source buffer's `buffer.length`.
+
+## INSTANCE MEMBERS
+
+### buf.data 
+The current value of the buffer.