[WIP] Features/susy scss api enhancements

Tim Ackroydrequested to merge
features/susy_scss_api_enhancements into master

Allows accounts api to be configurable with specific validation rules and where clauses

I've only done basic where clauses, needs some jazz on the handling of more complex where clauses using 'or' 'and' operators:

eg. path/accounts?fullname=~tim||phil

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