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/plugins/plugins-modifiers.md

@@ -0,0 +1,86 @@
+Modifiers {#plugins.modifiers}
+=========
+
+[Modifiers](#language.modifiers) are little functions that are applied
+to a variable in the template before it is displayed or used in some
+other context. Modifiers can be chained together.
+
+mixed
+
+smarty\_modifier\_
+
+name
+
+mixed
+
+\$value
+
+\[mixed
+
+\$param1
+
+, \...\]
+
+The first parameter to the modifier plugin is the value on which the
+modifier is to operate. The rest of the parameters are optional,
+depending on what kind of operation is to be performed.
+
+The modifier has to [return](&url.php-manual;return) the result of its
+processing.
+
+This plugin basically aliases one of the built-in PHP functions. It does
+not have any additional parameters.
+
+
+    <?php
+    /*
+     * Smarty plugin
+     * -------------------------------------------------------------
+     * File:     modifier.capitalize.php
+     * Type:     modifier
+     * Name:     capitalize
+     * Purpose:  capitalize words in the string
+     * -------------------------------------------------------------
+     */
+    function smarty_modifier_capitalize($string)
+    {
+        return ucwords($string);
+    }
+    ?>
+
+
+    <?php
+    /*
+     * Smarty plugin
+     * -------------------------------------------------------------
+     * File:     modifier.truncate.php
+     * Type:     modifier
+     * Name:     truncate
+     * Purpose:  Truncate a string to a certain length if necessary,
+     *           optionally splitting in the middle of a word, and
+     *           appending the $etc string.
+     * -------------------------------------------------------------
+     */
+    function smarty_modifier_truncate($string, $length = 80, $etc = '...',
+                                      $break_words = false)
+    {
+        if ($length == 0)
+            return '';
+
+        if (strlen($string) > $length) {
+            $length -= strlen($etc);
+            $fragment = substr($string, 0, $length+1);
+            if ($break_words)
+                $fragment = substr($fragment, 0, -1);
+            else
+                $fragment = preg_replace('/\s+(\S+)?$/', '', $fragment);
+            return $fragment.$etc;
+        } else
+            return $string;
+    }
+    ?>
+
+         
+
+See also [`registerPlugin()`](#api.register.plugin),
+[`unregisterPlugin()`](#api.unregister.plugin).