Adds note about needing rspec to run rake commands.

I was getting the following error when running `rake commonjs`:

```
rake aborted!
no such file to load -- rspec/core/rake_task

(See full trace by running task with --trace)
```

This was with a default OS X Lion install. The issue was simply that
rspec was not installed, however, it may not be obvious at first.

Simple if-statement fix

Fixes issue 105

Rackefile updated for rspec 2 & help file for tests

The MIT License.

* luke:
  add nexting example

* master:

HTML tag attributes in HTML5 can use single quotes (') as delimiters.

Patch by Tom Lynn.

* 'master' of github.com:janl/mustache.js:
  making it more dojo'y, and live in the 'proper' namespace

Closes #40.

Closes #39.

Use fancy regex to auto-fill the version number.
Closes #37.

it could be neat and there'd be s/kids/children/ — Oh well.

and partials are now performed on the current context and the top-
level view object. This avoids a ton of	copying	and duplication	of
view objects and contexts.

correctly. Since a list section pushes a sub-object of the
"view" into the "current" context, a partial should recognize
this altered context. The one-line change in mustache.js does
exactly this.

Closes #35.