adds possibility to use sqlite as a db

lib/config.template.php

@@ -4,11 +4,16 @@ class Config {
   public static $base_url = 'http://quill.dev/';
   public static $gaid = '';
 
+  // MySQL (default)
   public static $dbHost = '127.0.0.1';
   public static $dbName = 'quill';
   public static $dbUsername = 'quill';
   public static $dbPassword = '';
 
+  // Sqlite
+  // public static $dbType = 'sqlite';
+  // public static $dbFilePath = './example.db';
+
   public static $jwtSecret = 'xxx';
 
   public static $fbClientID = '';

lib/helpers.php

@@ -1,8 +1,12 @@
 <?php
 
-ORM::configure('mysql:host=' . Config::$dbHost . ';dbname=' . Config::$dbName);
-ORM::configure('username', Config::$dbUsername);
-ORM::configure('password', Config::$dbPassword);
+if(Config::$dbType == 'sqlite') {
+  ORM::configure('sqlite:' . Config::$dbFilePath);
+} else {
+  ORM::configure('mysql:host=' . Config::$dbHost . ';dbname=' . Config::$dbName);
+  ORM::configure('username', Config::$dbUsername);
+  ORM::configure('password', Config::$dbPassword);  
+}
 
 function render($page, $data) {
   global $app;

schema/sqlite.sql

@@ -0,0 +1,22 @@
+CREATE TABLE users (
+  id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+  url TEXT,
+  authorization_endpoint TEXT,
+  token_endpoint TEXT,
+  micropub_endpoint TEXT,
+  micropub_access_token TEXT,
+  micropub_scope TEXT,
+  micropub_response TEXT,
+  micropub_success INTEGER default 0,
+  date_created datetime,
+  last_login datetime,
+  last_micropub_response TEXT,
+  last_micropub_response_date datetime,
+  location_enabled INTEGER NOT NULL default 0,
+  syndication_targets TEXT,
+  facebook_access_token TEXT,
+  twitter_access_token TEXT,
+  twitter_token_secret TEXT,
+  twitter_username TEXT,
+  instagram_access_token TEXT
+);