Add messages when entering or leaving the level map ('X') in tiles. First attempts at outlining icons via cursor in tile tutorial. (Currently this only works for monsters, though I'm not sure why…)
And some code clean-up for tiles and the tutorial.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3301 c06c8d41-db1a-0410-9941-cceddc491573
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