FIXED: clipping for numerical stability in SoftmaxLayer was not equiv…

…alent to that of PyBrain.

FIXED: continuous memory of buffers was not detected correctly. (Smal…

…l speedups for pybrain users here)

Wrong parameter usage in the lstm layer for the construction of the h…

…eld mdlstm layer corrected.

Made arac compilation path invariant.

Added support for SharedFullConnections.

Also added some tests from pybrain's equivalence to ctypes test suite that test this exact behaviour within a BorderSwipingNetwork.

Compilation is now doine via distutils.