temporal_pooler_how_to.py uses obsolete Grouper

Grouper* were removed, so this file needs to go too.
(it wasnt functional anyway)
removed TemporalPoolerNode, used obsolete Grouper

TempPoolerNode used lot of Grouper code, which is unused, so that this file couldnt
be used either. So removed.

Updated RegionImplFactory to reflect the change.
removed Grouper reference from swig files