Add several small examples for comparing CUDA 6.0 and previous versions
in using some thrust functions.

Including fill, copy, transform, transform_if, sort, sort_by_key,
sequence and scatter. scatter_if on device is problematic in all
senses. Fill and copy are seemingly good. Transform and transform_if
works only if device pointers are passed. Sort is good for raw pointers
with default functors, but not good with functors. Scatter is somehow
undetermined.