Standard JSON schema

[vvasuki]

Akin to https://github.com/kmadathil/sanskrit_parser/issues/61, I think it's a good idea to adapt and contribute to a common datacontainer/ json schema definition - https://github.com/vedavaapi/sanskrit_data/tree/master/sanskrit_data/schema . Folks wouldn't then misspend time converting from one data format to another before usage.

Part-separately, I wonder if SanskritObject is more or less same as ScriptRendering