14025
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Issue 4492: move class CornerRounder close to users
http://code.google.com/p/pharo/issues/detail?id=4492
Issue 4494: remove PNMReadWriter
http://code.google.com/p/pharo/issues/detail?id=4494
Issue 4490: Deprecated12 code is still there
http://code.google.com/p/pharo/issues/detail?id=4490
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Marcus Denker -- http://www.marcusdenker.de
INRIA Lille -- Nord Europe. Team RMoD.
