Makefile, linting, and formatting

ios/.editorconfig

@@ -0,0 +1,22 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.swift]
+indent_size = 4
+max_line_length = 140
+
+[*.{plist,storyboard,xib,xcscheme,xcworkspacedata}]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab