modified CudaNdarray_Reshape to accept int as a shape object. Test this case and test that the GpuFlatten work correctly as it use this code.

allow the lib.amdlibm flag to be on when using nvcc. We disable it for nvcc as they don't work correctly together in device code.

This will remove most of the error message that was changed today for a warning.

fix a bug where we pushdown the max to the input of softmax, softplus, tensor.exp, tensor.log, tensor.tanh, sigmoid, softmax_with_bias.

Add test for this bug and print a warning by default if we encounter the case where the bug was causing problem. The warning can be disabled by the Theano flag warn.argmax_pushdown_bug.

Add test for CAReduce{maximum,mul} and modified CAReduce to handle correctly maximum.