fixed most of indenting and trailing spaces per PSR-2 standard as well as moving trailing spaces from text documents

.editorconfig

@@ -0,0 +1,13 @@
+root = true
+
+; applies to all files
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+; applies only to PHP files
+[**.php]
+indent_style = space
+indent_size = 4