Class rename, composer add, phpUnit tests add

Rename the class from ReadEnvFile to DotEnv.
Add everything to a composer json file so it can be published to
composer repository.
Add phpUnit tests for system

vendor/nikic/php-parser/lib/PhpParser/Node/Name/FullyQualified.php

@@ -0,0 +1,50 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Name;
+
+class FullyQualified extends \PhpParser\Node\Name
+{
+    /**
+     * Checks whether the name is unqualified. (E.g. Name)
+     *
+     * @return bool Whether the name is unqualified
+     */
+    public function isUnqualified() : bool {
+        return false;
+    }
+
+    /**
+     * Checks whether the name is qualified. (E.g. Name\Name)
+     *
+     * @return bool Whether the name is qualified
+     */
+    public function isQualified() : bool {
+        return false;
+    }
+
+    /**
+     * Checks whether the name is fully qualified. (E.g. \Name)
+     *
+     * @return bool Whether the name is fully qualified
+     */
+    public function isFullyQualified() : bool {
+        return true;
+    }
+
+    /**
+     * Checks whether the name is explicitly relative to the current namespace. (E.g. namespace\Name)
+     *
+     * @return bool Whether the name is relative
+     */
+    public function isRelative() : bool {
+        return false;
+    }
+
+    public function toCodeString() : string {
+        return '\\' . $this->toString();
+    }
+    
+    public function getType() : string {
+        return 'Name_FullyQualified';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Name/Relative.php

@@ -0,0 +1,50 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Name;
+
+class Relative extends \PhpParser\Node\Name
+{
+    /**
+     * Checks whether the name is unqualified. (E.g. Name)
+     *
+     * @return bool Whether the name is unqualified
+     */
+    public function isUnqualified() : bool {
+        return false;
+    }
+
+    /**
+     * Checks whether the name is qualified. (E.g. Name\Name)
+     *
+     * @return bool Whether the name is qualified
+     */
+    public function isQualified() : bool {
+        return false;
+    }
+
+    /**
+     * Checks whether the name is fully qualified. (E.g. \Name)
+     *
+     * @return bool Whether the name is fully qualified
+     */
+    public function isFullyQualified() : bool {
+        return false;
+    }
+
+    /**
+     * Checks whether the name is explicitly relative to the current namespace. (E.g. namespace\Name)
+     *
+     * @return bool Whether the name is relative
+     */
+    public function isRelative() : bool {
+        return true;
+    }
+
+    public function toCodeString() : string {
+        return 'namespace\\' . $this->toString();
+    }
+    
+    public function getType() : string {
+        return 'Name_Relative';
+    }
+}