When generating stats on acquirement items, note the percent of artefacts

created, and for weapons/armour the frequency of the various brands/egos.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8448 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on January 13, 2009
TPUN5AJ5NI7QCL7MIQH3VPYYW2O55TWXOSTAGV3AY23WVH7A3ZYQC
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