add a link to the document that should be read *before* installing this business template.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42738 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_full_text_sphinxse_catalog/bt/description

-Contains all SQL methods, scripts etc. that are required to use Sphinx Search Engine with MySQL.
+Read http://www.erp5.org/HowToUseSphinxSE *BEFORE* installing this business template. This contains all SQL methods, scripts etc. that are required to use Sphinx Search Engine with MySQL.
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bt5/erp5_full_text_sphinxse_catalog/bt/revision

-18
+19
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