Merge pull request #6 from boydgreenfield/master

Import of previous Bloom.jl over BloomFilters.jl; will require version bump 0.0.1 -> 0.1.0
Add a few more test cases; general test file cleanup.

Note: Major change is moving everything into a try/finally
so the filter mmap files aren't left lying around when the suite fails.
This makes local testing a bit nicer because one doesn't have to
rm -rf /tmp/*.mmap between test failures.
Update README.md

Corrected false positive rate in comment in first example.
Merge pull request #8 from sbromberger/master

Update / correct README.md
README