Bump copyright year to 2013.
Merge pull request #450 from jaredhoberock/copyright

Bump copyright year to 2013.
Avoid including <thrust/detail/config.h> in thrust/version.h.

Fixes #443
Merge pull request #451 from jaredhoberock/version

Avoid including <thrust/detail/config.h> in thrust/version.h.
Merge remote-tracking branch 'original/master'