Revise JSON persistence
Serialize directly to the output stream
Merge pull request #69 from jlewin/JsonPersistence

Revised Json Persistence - love it thank you!
Moved Store-type methods back to Store from Context, left General DB access in DBHost
Update tests and demo with modified object names
Resolve merge conflict with remote
BiggyList - Code Formatting Only/no code changes
Change refs from "context" to "hostDb"
Implement JSON Store under new architecture
Update tests against new architecture/Add tests against FileDb
Update perf examples against new architecture
Set app config/conn strings back. Oops.
Biggy - Implement Cache/Conn Injection only
Update Tests and perf exanples for Cache injection only
Remove InMemoryList - not needed
Add simple potential usage examples
Comment out Mongoy stuff until moved to new structure
Reset perf examples. #51
Fixed Issue with JsonStore where reverence to internal items list was being passed to client code, allowing external modification of list. Closes #74
Merged master