#35: No longer allow non-Transformer objects to appear within chains (E.g. `item['x'] >> 5 >> add('z')`). Removed the `__ror__` method on `Transformer` in order disallow usages like `5 | item['x'] | item['y']`. Added additional aliases for the `Value` Transformer.
#35: No longer allow non-Transformer objects to appear within chains (E.g. `item['x'] >> 5 >> add('z')`). Removed the `__ror__` method on `Transformer` in order disallow usages like `5 | item['x'] | item['y']`. Added additional aliases for the `Value` Transformer.

OOPMan/rightshift