improve reporting of errors from r
partial progress on #414
migrate new stars
Merge branch 'develop' of https://github.com/att/rcloud into develop
correct syntax; log; comment
log everything

i know this is annoying but it's a best practice to log everything
so that you have a chance of reconstructing what went wrong
if something does
change some 1s to TRUE

for consistency. shouldn't make a difference since these
are only used with list or compared with NULL
Merge branch 'develop' into feature/migrate-new-stars-old-notebooks
Merge branch 'release/1.0' into feature/migrate-new-stars-old-notebooks
update select control when updating cell language

fixes #605
Merge branch 'release/1.0' into feature/migrate-new-stars-old-notebooks