Added support for limiting memory used by the Lua interpreter.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@1613 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on June 21, 2007
Q2FZIIGQECGP2FKKWLGDBBQVGCFZ4JTY53PFPJP6X7YKC23AQGFQC
Change contents