* semantic versioning support for plugins

* add support for defining max myaac version in plugin.json file
* you can now require other plugin to be installed before yours
* added German translation
* fixed faq containing html code

system/libs/semver/Comparator.php

@@ -0,0 +1,111 @@
+<?php
+
+/*
+ * This file is part of composer/semver.
+ *
+ * (c) Composer <https://github.com/composer>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Composer\Semver;
+
+use Composer\Semver\Constraint\Constraint;
+
+class Comparator
+{
+    /**
+     * Evaluates the expression: $version1 > $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function greaterThan($version1, $version2)
+    {
+        return self::compare($version1, '>', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 >= $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function greaterThanOrEqualTo($version1, $version2)
+    {
+        return self::compare($version1, '>=', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 < $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function lessThan($version1, $version2)
+    {
+        return self::compare($version1, '<', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 <= $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function lessThanOrEqualTo($version1, $version2)
+    {
+        return self::compare($version1, '<=', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 == $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function equalTo($version1, $version2)
+    {
+        return self::compare($version1, '==', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 != $version2.
+     *
+     * @param string $version1
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function notEqualTo($version1, $version2)
+    {
+        return self::compare($version1, '!=', $version2);
+    }
+
+    /**
+     * Evaluates the expression: $version1 $operator $version2.
+     *
+     * @param string $version1
+     * @param string $operator
+     * @param string $version2
+     *
+     * @return bool
+     */
+    public static function compare($version1, $operator, $version2)
+    {
+        $constraint = new Constraint($operator, $version2);
+
+        return $constraint->matches(new Constraint('==', $version1));
+    }
+}