v0.1.0, 2010-12-01 -- Initial release.
v0.2.0, 2011-01-04 -- Add exc.reraise.
v0.3.0, 2011-04-13 -- Add replacefile.
v0.3.1, 2011-04-14 -- Make replacefile copy mode bits.
v0.4.0, 2012-04-26 -- Add exc.retry, retry_func.
