ported r248:252 from hidra branch:
r248: much improved installation instructions, especially for Debian
GNU/Linux distributions
r249: changed use of Spreadsheet::ParseExcel and MARC to require/import so
that dependency on those modules can be resolved in runtime.
r250: finished installation documentation
r251: removing dependency on HTML::Parser would ease installation
r252: smaller eval{} fiexes. eval{} logic should really move to
parse_format.pm
git-svn-id: file:///home/dpavlin/private/svn/webpac/trunk@255
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