Change grok to nupic

Renamed all instances of grok to nupic for the framework environment.  It is a pretty straight-forward search and replace
Merge new stuff

Merge remote-tracking branch 'upstream/master'
rename of grok OPF framework to nupic

Lots more files got changed to pass the unit tests.
merge upstream into master

Merge remote-tracking branch 'upstream/master'
fix first_order_0.csv
Merge pull request #1048 from moorejpdx/fix_1st_order

Continuation of Cleanup grok code for Issue #927