Graphene-gae

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* GraphQLHandler GET supoort ([PR 27](https://github.com/graphql-python/graphene-gae/pull/27))

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* Fixed DeadlineExceededError import swo connections properly handle timeouts

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* Improved behavior of `NdbConnectionField` when `transform_edges` also filters out some edges ([PR 26](https://github.com/graphql-python/graphene-gae/pull/25))

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* Added `transform_edges` to `NdbConnectionField` ([PR 25](https://github.com/graphql-python/graphene-gae/pull/25))

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* Added `_handle_graphql_errors` hook to GraphQLHandler

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* Added missing support for StructuredProperty