False values in a document show up as blank in the tree view.

[mglukhovsky]

As reported by shanebo on IRC:

shanebo: mglukhov r.table('tasks').insert({text: 'hello world', starred: false})
mglukhov: ok, i'm going to insert that document into a new table via the data explorer, correct?
shanebo: correct
        then get tasks table
mglukhov: what do you expect / what do you see?
shanebo: and you'll see this: http://cl.ly/image/1h0z1D32342I
        mglukhov see how the starred field has no output?
        even though it was set to false

False values don't render correctly-- this should be an easy fix for @neumino: http://cl.ly/image/1h0z1D32342I

[neumino]

So the bug was indeed because we were passing directly false to the handlebars template.
It's fixed in commit aaddc63, branch michel_790_false_values.
Code review 532.

I also found another bug for primitive value in the table view (r.expr(1) wasn't properly displayed).
It's also part of the fix.

[mglukhovsky]

Haha, that makes complete sense (Handlebars + falsey values).

[neumino]

Code review done.
Merged in 7764dde