Testing for lack of the SDK will have to go
Added testable-appengine-style Makefile
Add extra files to .gitignore
Change single-level load test
Add section title
Add documentation for multi-kind load
Prepare to load multiple kinds
Adding tests and data file for multi-kind loads
Add support for multiple kinds of models from a single JSON file
Merge branch 'develop'

message to explain why this merge is necessary,