Merged r6010 from trunk.
PDF: add *SJIS* and *Shift_JIS* in lib/redmine/export/pdf.rb for Japanese ja.yml general_pdf_encoding.
JRuby 1.6.2 (ruby-1.8.7-p330) does not support CP932.
Authored by: tmaruyama 2011-06-08
Parent: [r6013]
Child: [r6015]
