Update next, hasNext, each and toArray
Fix according to @mglukhovsky comments
Remove note about maximum call stack errors and memory leaks
First pass according to @mglukhovsky's comments
Add motivation to the last example of  and
Improve wording
Don't talk about hasNext in next + remove last example in hasNext
Merge pull request #58 from rethinkdb/michel_cursor

Update next, hasNext, each and toArray