switching to PSR-4 autoloading standard

.editorconfig

@@ -0,0 +1,18 @@
+; This file is for unifying the coding style for different editors and IDEs.
+; More information at http://editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.bat]
+end_of_line = crlf
+
+[*.yml]
+indent_style = space
+indent_size = 2

composer.json

@@ -17,12 +17,21 @@
         "issues": "https://github.com/RobThree/TwoFactorAuth/issues",
         "source": "https://github.com/RobThree/TwoFactorAuth"
     },
-    "autoload": {
-        "classmap": [
-            "lib/"
-        ]
-    },
     "require": {
         "php": ">=5.3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "@stable",
+        "cakephp/cakephp-codesniffer": "^2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "RobThree\\Auth\\": "lib"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "RobThree\\Auth\\Test\\": "tests"
+        }
     }
 }