createdAt and updatedAt date attributes
Merge pull request #2227 from aanfuso/timestamps

createdAt and updatedAt date attributes
Fix typo in schematypes docs

Mixed type example improperly embeds array in object...

`m.mixed = { [ any: { thing: 'i want' } ] };`
Merge pull request #2241 from paton/patch-1

Fix typo in schematypes docs