Added option msg_condense_repeats (defaults to true) which causes message

history to condense repeated messages into a single line, so that (for example) if you hear a Zot trap go off five times in a row while resting, message history will show:

You hear a distant "Zot!" (x5)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5575 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on June 7, 2008
FRP5W5USSND6AE6V7EOCLGUYPRYY7EFQBBBBMOE4OMKN7X2KRU6AC
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