Added README that might be useful for some, added svn:ignore stuff

SVN-Revision: 5432

diff --git a/data/images/engine/fonts/README b/data/images/engine/fonts/README
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+The list of letters in UTF-8 format that is currently used in the fonts can be optained with:
+
+ruby -e '((32..127).to_a + (128+32..383).to_a).each_with_index{|c,idx| print [c].pack("I"); if ((idx+1) % 16 == 0) then print [10].pack("I") end }' | recode "UCS-4LE..UTF-8"