Disable node integration tests temporarily
Clean up Scope.exit(keys) - reduce the number of kept keys to one.
Clean up IDEA warnings.
Merge branch 'master' of https://github.com/h2oai/h2o-dev
clean up links and names
Added skeleton document for error handling.
Comment out build break in deep learning.
Cleanup DL py tests.
Use OO design.
Add printouts in json format.
Always delete all keys at startup.
Delete unnecessary method calls.
Merge branch 'master' of https://github.com/h2oai/h2o-dev
use parent enviro
update jira test case
some cleanup of algorithms
is.factor issue fixed
Add some prototype model output (Error object) to DL models.
Merge branch 'master' of https://github.com/h2oai/h2o-dev
add a case with (c ..) and reals
Merge branch 'master' of github.com:h2oai/h2o-dev
this passes..have to use $ for lhs with indexing.
assuming v has at least one element, should this never fail?

  "ast": "(= ([ $t0 #0 #0) ([ (+ $v $v) #0 #0))",

  "error": "Column index out of bounds: tried to select column 0<=0<=-1.",
for arno: I forgot to disable the basic do_json_request timeout= (to None) when -nt is used