Upgrade to Guava 15.0-rc1, and use the newer ByteSource.wrap().
Merge pull request #2 from cgruber/upgradebytesource

Upgrade to Guava 15.0-rc1, and use the newer ByteSource.wrap().
Change withError to withErrorContaining.  The chances of us ever being
able to squash all of the corner cases around message formatting are
slim to none.
Merge pull request #3 from gk5885/messages

Change withError to withErrorContaining