Merge branch 'refs/heads/release/0.5' into develop
Switched to using more-restrictive file permissions
Updated .htaccess to remove trailing slashes from URLs
Made all XML files accessible without file extension
Fixed typo for pages directory name
Added plugins directory to blog config
Created Utilities class
Created initial Packages
Created Package Manager class
Added initial Plugin documentation
Deleted Plugin base class
Added instance of PackageManager to Blog
Added support for hooks
Added support for Phar packages
Created initial hooks documentation file
Merge branch 'refs/heads/feature/plugins' into develop
Added ability to publish drafts by adding to _publish directory
Added Blog do hook method to interface
Added flag to Post to determine if being published for first time
Added post publish hooks