streamline io check by using isIo instead of isModuleIo which was redundant
add new tester with peek and poke
change to testy name
Merge pull request #139 from ucb-bar/is-io-check

streamline io check by using isIo instead of isModuleIo which was redund...
Merge pull request #140 from ucb-bar/new-tester

New tester
improve testy to wait for processIO and add more to testy docs
fix two regression tests caused by recent changes to debug_nodes
merge from master