Update dev upgrade notes to mention updating of languages.

DEV_UPGRADE_NOTES.rdoc

@@ -3,8 +3,10 @@
 1. Download the new TinyMCE tarball and extract it to your Desktop (or other easily accessible location)
 2. Delete the copy of TinyMCE in the plugin at lib/tiny_mce/assets/tiny_mce (this ensures old/removed files are deleted)
 3. Copy the source files of TinyMCE (not the documentation) to lib/tiny_mce/assets/tiny_mce (so in that folder you should have a tiny_mce.js file)
-4. Update the CHANGELOG_PLUGIN.rdoc to say what you upgraded from, what you upgraded to, and your name
-5. Update CHANGELOG_TINYMCE (simply download and overwrite the contents with that of http://tinymce.moxiecode.com/js/tinymce/changelog.txt)
-6. Update the 'Bundled TinyMCE version' value at the bottom of README.rdoc
-7. Update lib/tiny_mce/valid_tinymce_options.yml with any new options, or remove old ones, as described in the tinymce changelog
-8. Commit, push, and send pull request to http://github.com/kete/tiny_mce
+4. Update CHANGELOG_TINYMCE (simply download and overwrite the contents with that of http://tinymce.moxiecode.com/js/tinymce/changelog.txt)
+5. Update lib/tiny_mce/valid_tinymce_options.yml with any new options, or remove old ones, as described in the tinymce changelog
+6. Download all locales from http://tinymce.moxiecode.com/download_i18n.php, unpack, and copy into place
+7. Update lib/tiny_mce/valid_tinymce_langs.yml with any new languages, or remove old ones
+8. Update the CHANGELOG_PLUGIN.rdoc to say what you upgraded from, what you upgraded to, and your name
+9. Update the 'Bundled TinyMCE version' value at the bottom of README.rdoc
+10. Commit, push, and send pull request to http://github.com/kete/tiny_mce