removed dependency to scipy and used numpy instead
fixed some convention discrepencies

fixed infer_shape
and
added dome tests

reviewed code... everything seems OK
added infer_shape
added a bit of doc

Typos

Up/downcasted is correct though. English is weird.

Better error message when compilation fails

This may catch more errors.

1. The g++ error message is now displayed in the exception text rather
than hidden before the file content is printed (which made it very hard
to notice).

2. If the call to Popen fails for some reason (e.g. because g++ is not
found), the command line is printed to stderr so that the user has a
better idea of what the problem may be.

Fix subtensor2

Add test for the IntDiv element wise operation.

Fix test

When the step of a slice was not 1, we didn't correctly computed the
size when the number of element was not a multiple of the step. This
caused a crash at run time.

(like when they are int).

Add ceil_intdiv with associated tests.

Also rewrote with Olivier D. the comments and docstring to make it more clear.

Addition of new keys was not done in the new dict
Moved copymod to allow to use it in all tests value.

Added tests of some assumptions made on Numpy

Explain better why override some options in tests

Also some minor cosmetic changes to output.

Force the wanted device and floatX in the buildbot script.

Fix failing tests in tensor module

Doc str