README: Dereferencing section clarification + describe dot notation

It was confusing to present the concept of dereferencing a nested object and
enumerating over a list in an same example intended to show dereferencing a
nested object. I believe this example illustrates the concept more clearly.

Remove tab whitespace that was added during dot notation merge.

Support for Dot Notation, with tests.

- all tests passing
- updated test to include check that it doesn't break IMPLICIT_OPERATOR
- added fix to ensure that you can access global context from within 'dot notatated' blocks

Add qooxdoo wrapper. Use `make qooxdoo`.

Trailing whitespace OCD fix.

* twitter/master: (34 commits)
  Check for existence of engines before running tests, better logging
  version -twitter-b
  fix a bug in regex generators, make cache global
  cached regexes
  remove the backslash escaping
  updated changelog
  re-link jsc and add a bit more doc
  remove i18n stuff
  fix typo in readme
  nice clean up to render_section, as suggested by @esbie
  preserve translation-hint correctly
  made gettext return the right thing for translation-hint mode
  send translation mode in single parameter to _
  updated i18n test
  don't render during i18n step, just do replacements
  remove commented out lines from run_js
  clean up some logic
  added test descriptions and instructions to the readme
  more readme stuff
  moved new tests into new examples/* files
  ...

Back Slashes shouldn't be escaped in HTML

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.

Conflicts:
	mustache.js

Simple if-statement fix

Fixes issue 105

Rackefile updated for rspec 2 & help file for tests

The MIT License.