various cleanups

- added Scrutinizer
- added EditorConfig
- removed closing php tags
- proper usage of require_once
- cleaned extra spacing

.editorconfig

@@ -0,0 +1,16 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.yml]
+trim_trailing_whitespace = false