Some cleaning and added docblocks.
Merge pull request #215 from pvankouteren/no-issue-low-hanging-fruits

Some cleaning and added docblocks.
Made 'taxonomies' as link => value arrays.
Finetuning..
Fixes #217. Like Patrick says: "Yay for Unit Tests!"
Updated composer.json and .lock. "~2.2" doesn't really work properly (yet).
Added docs to Extensions class. Refactored string locations into constants in Location class (basically categorizing them) to prevent mistakes and easier lookup.
Better indented code and removed some unnecessary whitespaces
Added {{ showimage }} tag, analogous to {{ fancybox }}

Conflicts:

	app/src/Bolt/TwigExtension.php
Merge pull request #218 from pvankouteren/extensions-cleanup

Added docs to Extensions class. Refactored string locations
Whoops. merge conlicts fixed.
Added 'order()' filter, to sort/order an array of records on a field.
Some tweaks related to the 'version number':

- Display name and version in Nut
- Send version number along with news-fetcher.
Getting started with YamlUpdater class.
Oops.
Working on config:get and config:set Nut tools.
Don't change the slug, if it's already set.. Fixes #222.
Added 'extensions', 'extensions:enable' and 'extensions:disable' nut commands.
clearcache should _also_ clean up twig and timthumb cache files.
Markdown is now in our composer.json. Working on #195.