Added "Perl Packages" text file

This explains the Perl package dependecies (as per xQuest website)

perlpackages.txt

+BioPerl
+Data::Dumper
+File::Copy
+MIME::Base64
+HTML::TreeBuilder
+XML::TreeBuilder
+Math::Gauss
+Math::Trig
+Statistics::Regression
+Statistics::TTest
+Chart::Gnuplot
+Statistics::Distributions
+Term::ReadKey
+Time::HiRes
\ No newline at end of file