Update the Tiles section of the installation guide seeing how the

makefile names have changed. The OSX section probably needs to be overhauled (we now have a makefile.osx) but I don't know anything about that.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9301 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on March 1, 2009
DR2DDPGRMZXKH3427HL4X5KLXLHUS5KNFBGQ3HO7X7QCJQIKTAGQC
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