Use file mode if mmap is not available
Loosen up exception test regex
Make pylint happy
Newest pylint doesn't seem to like extension module
Add memory mode and expose the modes. Closes #10
Possible fix for PyPy
Correct skipping of tests without extension
Correct format. Add modes to benchmark script
Test MODE_AUTO
Fix and test compatability func
Merge pull request #11 from maxmind/greg/file-mode

Use file mode if mmap is not available