Fixed 1612023: !d was not respected. Now dropping items with !d will

ask for confirmation for each item and abort multidrop if it receives a negative answer to anything.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@602 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on December 9, 2006
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