removing 'base' from python and javascript reduce and gmr
removing optional base from ruby driver reduce and gmr
removing mentions of base optargs from the .proto file
Add package.json for update_semilattice tool
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Init script: fail when given an unknown command

Closes #1779
Review 1112 by @mlucy
Merge branch 'next' into sam_alt
Merge branch 'sam_alt' into sam_alt_snap