Added editor config file to preserve the weird 2 spaces indentation everywhere when submitting a PULL REQUEST

Author: zipang

.editorconfig

@@ -0,0 +1,19 @@
+# EditorConfig is awesome: 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
+trim_trailing_whitespace = true
+charset = utf-8
+
+# 2 space indentation
+indent_style = space
+indent_size = 2
+
+[**.md]
+# trailing spaces have a meaning in markdown
+trim_trailing_whitespace = false