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Merge pull request #15 from ruebot/master

sure, why not :-)
Merge branch 'python2.4-support'
v0.9.9 now has support for python back to v2.4 fixes #14
added new test for bug regarding slow validation with extra files
check for differences between manifest entries and filesystem during validation
Merge pull request #17 from BHSPitMonkey/master

Add checks to ensure that extra data files cause validation to fail
no more python2.4 on travis; also tagging v1.0.0!