Sepiida

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Add sepiida.permissions.always_privileged. This is for backend processes as a convenience to specify that no matter what, permissions requests should be made with elevated privileges, not user privileges. Use with caution

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Use arrow to parse ISO8601 formatted strings as datetime. Now all datetime objects will include timezone information.

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Change the way that ERRORS on APIEndpoints are done. Previously they were tuples that identified

(exception class, status code, error code, error title)

Now we use an actual class, sepiida.errors.Specification. The constructor takes the arguments in exactly the same
order, which is good, but now offers the ability to *not* specify the title in favor of specifying the docs argument which
will avoid overwriting any title provided by an exception and just provide information for the RAML documentation

Old versions of the ERRORS specifier using tuples will emit a warning and then silently ignore any specifiers of that type, so be aware. In sepiida version 8 this will be entirely removed for performance reasons

Furthermore, the way that filters are parsed has changed. We can now support `filter[foo]>bar` and `filter[foo]<=bar`. This means that all filter field objects now include the operation that was requested as well as the name of the filter and the values filtered. This is still provided as self.filters.

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New tag of 6.8 since I had to fix some unit tests

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Various minor improvements to OPTIONS response and RAML file generation. Also filter now enforces the choices option

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Automatic RAML file generation. Just make an OPTIONS request to the root of the API. You do need to register first with sepiida.options.enable