Feature/add docs (#689)

* Add converted docs repo

* Set theme jekyll-theme-minimal

* Removed BC docs, added TOC

* Added TOCs, rewrote most important links in documentation. Linked README to new Github Pages site

* some link fixes

docs/programmers/api-functions/api-get-config-dir.md

@@ -0,0 +1,40 @@
+getConfigDir()
+
+return the directory where config files are stored
+
+Description
+===========
+
+string\|array
+
+getConfigDir
+
+string
+
+key
+
+
+    <?php
+
+    // set some config directories
+    $smarty->setConfigDir(array(
+        'one' => './config',
+        'two' => './config_2',
+        'three' => './config_3',
+    ));
+
+    // get all directories where config files are stored
+    $config_dir = $smarty->getConfigDir();
+    var_dump($config_dir); // array
+
+    // get directory identified by key
+    $config_dir = $smarty->getConfigDir('one');
+    var_dump($config_dir); // string
+
+    ?>
+
+       
+
+See also [`setConfigDir()`](#api.set.config.dir),
+[`addConfigDir()`](#api.add.config.dir) and
+[`$config_dir`](#variable.config.dir).