Make SparseVariable test of Theano memory contract use the generic test fct. This make it test more case. I needed to change to idiv as implace op as scipy sparce support only idiv as inplace op.

The test_default_shape function in both modules was coded incorrectly. It used
the same generator for uniform and multinomial samples, whereas the modules being
tested used different generators for the uniform an multinomial samples.

It only worked for as long as it did because only a single multinomial sample
was being tested, and by chance the different generators  happened to draw the
same bit.

Enable sparse elemwise multiplication by a something that can be converted to a tensor but is not a tensor or a sparse. Test it(and add test for all sparse mul at the same time)

using Variable's comparison operators

Need to swap inheritence order for class ScalarVariable: inherit
_scalar_py_operators first, then Variable

inc_subtensor/set_subtensor.

* changed inheritance order of TensorVariable to include _py_operators before
Variable, so that TensorVariable can use the comparison operators defined in
_py_operators

inc_subtensor/set_subtensor, as the previous implementation is now deprecated.

import the version of theano and nothing else. In some case we could import the version from another project.