added .sum() and .average() deferred calls
added groupBy to normalization
added groupBy deffered
added min and max to exclude from normalize
added min() and max() deferred
Merge pull request #82 from Zolmeister/master

Added groupBy(), sum(), average(), max(), and min()
normalize criteria on findOne()
assume that undefined === null when it comes to criteria. closes #84
require a criteria object in findOne()
fix tests for findOne
normalize undefined to null on create, update
normalize criteria when used. fixes #80
Merge pull request #72 from wanderer/master

added custom types option to water line
make the default timestamps DATETIME instead of DATE
add unique constraint to auto ID. #69
cast insert values using generated schema. #68

Move the cast generation after the schema generation so that it has access
to the auto-generated keys such as ID. Then seed the cast types with the
newly created schema instead of just attributes.
0.9.1
Upped anchor dep.
0.9.2
fix lowercase DATETIME to work correctly with casting