Validation

Update Post Model for validation title and body

PostsController@store
 - validation failure, redirect back to the create action with the
validation errors.
 - validation errors are shown to the user.
Removed all external CSS Templating - Back to basic bootstrap

Conflicts:
	app/storage/logs/laravel.log
	app/views/posts/show.blade.php
	public/assets/css/site.css