Ported in a new write method.
No activesupport.
Test for batching other operations with the write.
Refactor.
Don't modify the hash.
Work with cassanity 0.4.0 and 0.5.0.

... else I get this error:
https://gist.github.com/spraints/03fd6ce77c78fc05bfb5
Merge pull request #1 from spraints/accept-batches-on-write

Accept batches on write.