fixing null and undefined lookup

pre-commit hook refactoring, closes #432

Added `-v` option to CLI, bugfix for rendering `Number` when it was the
context, and specified files in package.json for cleaner `npm install`.

Specifying files in package.json

Good npm citizens should specify which files a npm module consists of
so module users dont have to download all the unnecessary things.

Bugfix for number rendered as [object Object]

+ minor fix for better error message when running specific render test

Fixes #415

CLI: -v option for displaying current version

Fixes #431

Created command line tool

Improve documentation to explain that Inverted Sections uses falsy

CLI used to render a mustache template with a data view, writes the template into stdout when successfull. Otherwise meaningfull errors into stderr.

Fixes #424

run jshint before tests, support of node back to v0.6

- Documented required version of npm while developing
- Use the latest npm client for node >= v0.8 on travis

Special quirks to get node v0.6 supported:
	- npm client v1.3.26 on travis
	- jshint 2.4.4 as >= 2.5.x breaks

Cleanup tests section in readme

Refactor Writer.renderTokens() for better readability.

Split the old Writer.renderTokens() into several small functions with a single responsible.

added pre-commit hook and hook installer, resolves #401

an image is wroth a thousand words

Conflicts:
	package.json

Section with "length" property

changed mocha reporter to spec and bumped mocha version, solves #403

Also run node v0.11 on travis

Updated version patch

Fixes AMD registration, volo package.json entry

This change allows the AMD define signature to match what common AMD optimizers use to find define calls that need naming.
Also updates the volo package.json entry so that the correct version of mustache can be fetched properly.