Fix namespace in composer file, add readme + test file

Corelibs -> CoreLibs

test/ folder for test files (future phpunit test)

vendor/composer/autoload_static.php

@@ -7,14 +7,14 @@ namespace Composer\Autoload;
 class ComposerStaticInit610a8785884d9612d153c0422940ab8a
 {
     public static $prefixLengthsPsr4 = array (
-        'E' => 
+        'C' => 
         array (
-            'Egrajp\\CorelibsComposerAll\\' => 27,
+            'CoreLibs\\' => 9,
         ),
     );
 
     public static $prefixDirsPsr4 = array (
-        'Egrajp\\CorelibsComposerAll\\' => 
+        'CoreLibs\\' => 
         array (
             0 => __DIR__ . '/../..' . '/src',
         ),