pmt: fixed where pmt's __init__.py script gets installed.
docs: fixing typo.
vocoder: converting to private impl format.
Merge branch 'next' of gnuradio.org:gnuradio into next
vocoder: updating QA test for vocoders.
Merge branch 'next' of gnuradio.org:gnuradio into next
pmt: fixing a few files with older pmt naming style.