fft: using new Elementwise API
test/computations/transformations: updated for new module API
TODO: moved CBRNG modules for later
cluda/cuda, ocl: setting render_args to an empty array if None is passed
reduce: using modules as predicates
core/operation: fixed wrong base names passed to leaf_signature()
matrixmul: using newstyle functions
fft: using newstyle functions
doc/introduction: using newstyle functions
cluda, helpers: removed unused functions
TODO: the task has been actually finished already
cluda/kernel: generalized data traversal