New scan [work in progress]

Make theano.version functional regardless of whether setup.py has been run

test for the recent fix for one optimization of scan

Fix scan savemem

test for the recent fix to R-op

This refers to a bug report by Justing Bayer on 12/22/11 on the
theano-users mailing list.

added verbose exception for elemwise perform

fixed bug where ifelse rejected sparse types

objects

Scan grad computation fixed

Cvm runs testsuite

improved doc for get_debug_values

removed extraneous space

Fixed crash when theano.version does not exist

This is the case for instance when someone directly uses the git
repository without running setup.py.

Feature: advanced inc subtensor grad

More readable error when compilation fails

improved doc for R_op
it all looks good. There is one line that I think does not respect PEP8 convention but I'll fix it in another pull request

Include the theano version in the compiledir.

added ability to use debug_assert without a message argument

fixed a bug where get_debug_values returns tuple(val) rather than val in

the case where it is fetching the value of only one variable

* No more forgetting to clear the cache!
* No more collisions when running multiple theano versions at once!

fixed error handling and doc for ifelse

(there was a problem that would reject a pair of branches
where one was shared and the other was not, regardless of
whether they had the same type)

The extract_constant function was not aware of the new scalar shared
variable and hence it did not do the right changes in that case.