Update docs for reduce. Related to #170 and #181
Fix for reduce
Merge master in miche_181_ruby_reduce + update for the new reduce
Mention max as a shortcut
Fix for Python reduce's syntax + Ruby blocks
Merge pull request #249 from rethinkdb/michel_181_post1.12

Merge michel_181_post1.12

Fix #181 -- reduce for ruby
Fix #170 -- reduce isn't fold