WIP feature to test support for unicode in text fields
Encode and decode values to draft in utf8
Revert to convert value to string only if it wasn't a string

Was being a numpty and overcompexified encoding
Test a claim with special characters is saved correctly

WARNING: this will fail if the wader database in postgres is not set UTF-8.
Merge pull request #115 from InsolvencyService/support-unicode

Support unicode