Add some release notes info to the changelog.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2652 f5dc347c-c33d-0410-90a0-b07cc1902cb9

doc/ChangeLog

@@ -1,6 +1,11 @@
 Mantis ChangeLog
 
 2004.07.07  -  0.19.0a1
+
+This is an alpha version of 0.19.0, it is not recommended for production use.  Users are encouraged to test it on a backup copy of their data and provide feedback to development team.
+
+Users installing Mantis for the first time should sql/db_generate.sql to create the database, then run the http://www.example.com/mantis/admin and run the upgrade scripts.  Already existing users will need to backup their database, then run upgrade.
+
  * Enh #0000: Change of terminology, replaced "bug" with "issue" [first step in #2710].
  * Enh #0000: Generate one email per user. Stage #2 (minor send mail optimization - used kept alive SMTP connection).
  * Enh #0000: phpMailer 1.71 has been included to Mantis distribution, all the mails are sent now only by phpMailer.