Traditional Chinese translation update.

Thanks @hlb and Ilya Lee, and I need review on the updated translations.
change $lang to zh-tw.
change acronym to abbr, and re-translate things
some translation fixes

* fix missing translations
* translation fixes by @hlb and me
Update zh_tw.php

"There's a continuing need to show the power of CSS."
Update zh_tw.php

Punctuation fixes
Update zh_tw.php

* remove bogus symbols
* drop one line wrap
Merge branch 'master' of https://github.com/medicalwei/csszengarden.com into medicalwei-master