Add EditorConfig

.editorconfig

@@ -0,0 +1,24 @@
+# http://editorconfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.{cpp,h}]
+charset = utf-8
+indent_style = space
+indent_size = 4
+tab_width = 4
+trim_trailing_whitespace = true
+
+[*.sh]
+indent_style = space
+indent_size = 4
+
+[*.php]
+indent_style = space
+indent_size = 4