add QueryException implementing Everyman\Neo4j\Exception
add QueryException implementing Everyman\Neo4j\Exception

DenisGold/NeoEloquent,togusafish/logikinc-_-NeoEloquent,logikinc/NeoEloquent,pchaow/NeoEloquent,tomb10516/NeoEloquent,andrewdalpino/NeoEloquent,sgpatil/NeoEloquent,geminixxl/NeoEloquent