Applying static method conventions to acr.cc and items.cc - this resulted

in removing several unused functions from the latter file.

Renaming tiles options show_items and title_screen to tile_show_items and tile_title_screen. And as usual, cleaning up tiles code some more.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3876 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on March 25, 2008
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