Fix typo in syntax chapter

The versions of gems specified in the Gemfile.lock require ruby 1.9.3.
Update them to the latest and greatest gems.

This removes the following warning:

Deprecation: The 'pygments' configuration option has been renamed to 'highlighter'.
Please update your config file accordingly. The allowed values are 'rouge', 'pygments' or null.

…elopment

Update development environment

[refs coffeescript-cookbook#142]

Replace page data with site data

[refs coffeescript-cookbook#142]

* Update object-literal.md

The example was wrong. It stated that ?= is similar to JS || when the || will affect not only not defined scenario but also any falsy values (values that evaluate as false)

There are way to many differences between the 2:

1. window.var = false;
2. window.var = 0;
3. window.var = '';
4. window.var = [];
5. window.var = null;

window.var ?= 'something'
console.log(window.var) ->
1. false
2. 0
3. ''
4. []
5. 'something'

window.var ||= 'something'
console.log(window.var) ->
1. 'something'
2. 'something'
3. 'something'
4. []
5. 'something'

* Update object-literal.md

* Update object-literal.md

Because I've [contributed fixes to the code base][1] I thought maybe I could be
on the attributions list.

[1]: https://github.com/coffeescript-cookbook/coffeescript-cookbook.github.io/search?q=author%3Asukima&type=Commits

…ok/authors-self

Add myself to the Developers list