Stop checking if the ETS table exists in the ETSStore

This is impossible to know in any other scenario but putting the
filter in your router during development.
Merge pull request #148 from devinus/lazy-etsstore

Stop checking if the ETS table exists in the ETSStore
updating binary_to_atom deprecation
Merge pull request #150 from jwarwick/binary_to_atom

Updating binary_to_atom deprecation
Update to latest Elixir
Docs: Change resp_body to sent_body

`f849b33f` changed `Dynamo.HTTP.Test` to return the body as `sent_body` instead of `resp_body`. Changes docs to reflect that change.
Merge pull request #153 from michihuber/patch-1

Docs: change resp_body to sent_body
Update to Elixir v0.11.1-dev
Changed setelem to set_elem
Merge pull request #154 from marcioj/patch-1

Changed setelem to set_elem
Make use of build_per_environment
Add simple ecto example

Provide a simple dynamo application that uses
Ecto to retrieve records from a database
Merge pull request #155 from nurugger07/simple_ecto_example

Add simple ecto example