Merge branch 'develop'
- created nuget package for v1.3.0
- updated to AWSSDK 1.5.25
- updated AWSSDK to v2.0.2.4
- removed support for v1 queries and scans
- handle the case when LastEvaluatedKey is empty instead of null
- updated to Nunit 2.6.3
- updated to FsUnit 1.2.1.0
- WIP on FAKE build script
- updated icon url to use what's in git
- made DynamoDb.SQL a .Net 4.5 project
- updated to AWSSDK 2.0.4.1
- removed the unnecessary async extension methods and use the one built-in to the SDK