Remove the BUILD_REVISION define which was apparently never used, and

directly use svn_revision in the version output. Also add 0.5 version highlights, while I was at it.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8245 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on January 5, 2009
N7J2IWU7B34XIUYWHJF2RTRAXXAQLVVZLWWHFWN4FC5PLNFFEWCAC
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