Add 'include' & 'require' statements test.

tests/data/includes/base_class.aer

@@ -0,0 +1,8 @@
+class BaseClass {
+
+	protected void run() {
+		printf('Test launched...');
+		include 'data/includes/include_test.aer';
+	}
+
+}

tests/data/includes/include_test.aer

@@ -0,0 +1 @@
+printf("OK!\n");

tests/data/includes/test_class.aer

@@ -0,0 +1,3 @@
+class Test {
+	string $test = 'This is a test';
+}