changed json output to a more standard format
updated README to reflect new json format
Ignore WebStore IDE files
Update project name in README.
Return default status codes of 200 for success and 400 for error.
Return proper status codes for all calls.

201 for create
404 for entity or model not found
405 for method not allowed.
500 for database / server error.
Send status codes in http response.
Switch to sqlite db for tests.
Update tests to check status codes instead of status message.
Add tests for 404 on entities that don’t exist.