Update alpha3 changelog

Changes.md

@@ -4,14 +4,21 @@ This file is a manually maintained list of changes for each release. Feel free
 to add your changes here when sending pull requests. Also send corrections if
 you spot any mistakes.
 
-## ? (unreleased)
+## v2.0.0-alpha3 (unreleased)
 
 * Implement support for `LOAD DATA LOCAL INFILE` queries (#182).
 * Support OLD\_PASSWORD() accounts like 0.9.x did. You should still upgrade any
   user accounts in your your MySQL user table that has short (16 byte) Password
   values. Connecting to those accounts is not secure. (#204)
 * Ignore function values when escaping objects, allows to use RowDataPacket
   objects as query arguments. (Alex Gorbatchev, #213)
+* Handle initial error packets from server such as `ER_HOST_NOT_PRIVILEGED`.
+* Treat `utf8\_bin` as a String, not Buffer. (#214)
+* Handle empty strings in first row column value. (#222)
+* Honor Connection#nestTables setting for queries. (#221)
+* Remove `CLIENT_INTERACTIVE` flag from config. Improves #225.
+* Improve docs for connections settings.
+* Implement url string support for Connection configs.
 
 ## v2.0.0-alpha2 (2012-05-31)