reverted my change to module.py as they cause some trouble. I will look at them after the hollydays.

better test and removed the test test_no_shared_members as it have no reason to exist. The shared/non-shared ness of a results is tested in other test.

added partial test for this.

updated the test

-updated test to reflect this.

good implementation of test_method_in_list_or_dict. This found a bug that we don't support [[Method()]] or for tuple... We suppport only 1 deep of container.

added implementation of test_shared_members. This found a bug that list of list, list of tuple, tuple of list of member don't work

- revised destroyhandler to be more efficient, in view of how frequently
  env.destroyers() was being called.
- fixed errors in tensor.flatten(), but also changed semantics of the optional
  shape parameter.
- added testcases of the previous merge optimizer fix.

-started writing missing test.

was being copied, but not the value itself

bugfix. If you used Value, TensorValue, tensor.value(), the value was not considered as an input. So this was making the inplace_opt optimizer optimize it while it should not be doing it.

- added allow_gc option to PerformLinker and OpWiseCLinker, which results in
  temporary results being freed as soon as possible.  This can have a negative
  impact on performance (we have to re-allocate outputs) but allows us to
  evaluate graphs piecewise, even if not all temporaries fit in memory at
  once.

- modified Function so that internal references to `required` input arguments
  and computed output arguments are removed after a call.  This means that
  these values are not stored by pickle.

- modified MergeOptimizer to use a more efficient algorithm.  The previous one
  was at best quadratic in depth, and at worst exponential in depth.  The new
  one should be worst-case linear.

* Implemented TensorDot op (see numpy documentation for details)
* Added respective test cases under tests/test_basic.py
* Print node now accepts a list of things to print, which can be input node
attributes or functions (eg. "__repr__"). By default, will print input.__str__() as
before