Merge pull request Medium#24 from Medium/nick-local

fix heap space option, and add tests

Merge pull request Medium#23 from Medium/nick-api

Add an api for giving local-dynamo more heap

Merge pull request Medium#22 from Medium/kyle-name

s/Obvious/Medium/

Merge pull request Medium#18 from Medium/nick-update3

Update local-dynamo

Upgrade to the 2014-01-08 version of AWS DynamoDB Local

Re-organize the code to lib and bin