Add self-made replacement for Temple Cl*.png assets

The original assets were not licensed CC-BY-SA 3.0 and thus not added here.
To redo them, I used the AR PL UKai TW font under the Arphic Public License
(https://www.freedesktop.org/wiki/Software/CJKUnifonts/Download/).

Note: the Chinese characters are flipped horizontally so that they appear
properly on the back of players.

Part of #26.