[#37] Draft implementation of AnyDynamoDbExecutor
[#37] Improvements for AnyDynamoDbExecutor
[#37] Fix bug in TableModelInitializer
[#37] Handle LimitExceededException
[#37] Implement batchWrite
[#37] Fix bug: parsing xml referenced elements
[#37] Parsing improvements
[#37] Writers, readers refactoring
[#24] First part of tests
[#24] Tests for writers
[#24] Port tests to specs2
Merge pull request #37 from bio4j/dynamodb/operations/executor

Implement dynamoDB operation executor