Fix #236.

    InversePermutation
    ReorderRowElements

argument "ndim_added" to random_function.
Use that mechanism for "multinomial" and "permutation" distributions.

distribution.

Changed RandomStream.perform so it casts the shape into a tuple, to work
around a bug in numpy.

put the default value of THEANO_BLAS_LDFLAGS into config.py and changed so that if empty, we will use numpy.dot(no c_code)

added disable the generation of conv_full_patch_stack_padded directly in GpuConv to test the hard coding of more parameter.

small fix. python don't seam to like that we put the default value of an argument to be the result of a fct call to another module.

new config system based on the execution of theano/config.py. Changed all call to os.getenv to use this file and put the config from gof/utils.py in the new file.

-pass verbose and version to new op generated by ConvOp.grad()