Add and document Ecto.Query.API.array/2.
Merge pull request #315 from alanpeabody/add-and-doc-array/2

Add and document Ecto.Query.API.array/2.
Fix code quote in docs
Add missing docs for one, one! and get!
Remove duplicated join code
bump ecto version number in readme
Merge pull request #317 from lancehalvorsen/bump-package-versions-in-readme

Bump Versions for Ecto and Postgrex in README.md
Explicitly stand out that the SQL is not generated
Merge pull request #318 from trenpixster/patch-1

Explicitly stand out that the SQL is not generated
Document invariant for Ecto.Repo.log/2
Merge pull request #319 from Havvy/master

Document invariant for Ecto.Repo.log/2
Updating poolboy to 1.4.1 re #320
Merge pull request #321 from jeregrine/upgrade_poolboy

Updating poolboy to 1.4.1