Potential refactor with WTForms

[clach04]

Alternative to #23

Use:

• https://github.com/guillaumepotier/Parsley.js/
  • https://github.com/raicheff/wtforms-parsley
  • https://github.com/fuhrysteve/wtforms-parsleyjs
• and either keep SQL layer or replace with SQLAlchemy

https://github.com/zbyte64/wtforms-jsonschema
https://github.com/dolfandringa/wtforms_jsonschema/

https://github.com/kvesteri/wtforms-json