grc: disable port type caching on init
Added set_ methods for most parameters in (almost) all gr-trellis blocks
Added FSM functionality + minor fixes
Updated documentation and grc/python examples in gr-trellis.
Removed weird pyhton examples and made them grc files.
fixed a bug in pccc encoder/decoder, and added fsm files.
Also added locks in the set_ methods
grc: append blocks path with prefix /usr/local if installed to prefix /usr
Merge remote-tracking branch 'anastas/trellisupdates'
Merge remote-tracking branch 'gnuradio-wg-grc/master_grcwg'
Merge remote-tracking branch 'gnuradio-wg-grc/maint_grcwg' into maint
Merge branch 'maint'
qtgui: fixed an issue with the number sink mistreating non-float inputs.

Dealing with ints will require an api change.
Merge branch 'maint'