Better exception handling

Fixes for Python 2.4

Using
    class X():
triggers a SyntaxError with Python 2.4

Infer shape

Implement tensor.sort(..., axis=None)

Sparse

Added tensor.sort() op

Sort2

Added missing tests for sparse op infer_shape op and replaced 2 tests that had error and implemetend them with DWF tests systems.

Fix local_upcast_elemwise_constant_inputs optimization

That code was triggering a crash (assertion error)

Fix bug reported by John Salvatier

News

Sparse verify

Fix to 2 blas tests in DebugMode

Remove warning