fix doctest with option
Record respects string inputs
add more types to registry
Merge pull request #68 from mrocklin/record-string-inputs

Records respect string inputs
add raises util
unite on empty input raises exception
discovery uses local namespace, not md's namespace
Merge pull request #69 from mrocklin/unite-error-check

Unite error check
add `touch build.sh` to binstar.yml script
fix typo in conda.yaml
remove excess `setup.py install` from conda.yaml
screwing with conda.yaml
Tuple ensures all inputs are DataShape objects

Is this correct behavior?  Unpacking instead yielded errors
giant-ish refactor of discovery
discovery supports dates
Merge pull request #70 from mrocklin/big-discover

Update discovery