Merge pull request #142 from maxfierke/master

If an SQLite database exists, but is not writable, return a lowLevelError
Fix composer after merge with master
Merge pull request #144 from richardhinkamp/composer

Fix composer after merge with master
Added getReference, next and previous to Bolt\Content. Fixes #143.
Sort listings by "datepublish DESC" if no order is given or implied.
Getting a load of work done on new extensions.
Using initialize, instead of init()
Improved addCSS and addJavascript for extensions.
Minor fix in util.php
Fixed Simpleforms.
Minor fix in Content: Check if 'video' field is an array..
Don't try to call methods on non-existant objects.
More changes to Extensions. BaseExtension now extends Twig_Extension, so twig functions can be in the Bolt Extensions themselves.
Updated FacebookComments
Getting stuff done on Extensions: now using config.yml.dist.
Fixing the clearing of the Log.
Changed config.yml to config.yml.dist
Updated composer.lock
Updated .gitignore: ignore config.yml from now on.
Updated composer.lock