Update chat/lib/lang/zh-tw.php

Minor fixes for zh-tw translation.
Merge pull request #33 from MrOPR/patch-1

Update chat/lib/lang/zh-tw.php
updated readme
updated readme.txt verson
spanish lang file to utf8
changelog cleanup
Declare static methods as static
Merge remote-tracking branch 'upstream/master'

Conflicts:
	chat/lib/class/AJAXChatEncoding.php
	chat/lib/class/AJAXChatFileSystem.php
	chat/lib/class/AJAXChatString.php