Merge pull request #1 from fengzhe29888/trellisupdates

Trellisupdates from Zhe
added set_ functions
added calls to set_multiple and set_rate
Merge branch 'trellisupdates' of https://github.com/fengzhe29888/gnuradio-git into trellisupdates

Conflicts:
	gr-trellis/include/gnuradio/trellis/metrics_X.h.t
added set_ methods to siso blocks etc.