Add .editorconfig

.editorconfig

@@ -0,0 +1,21 @@
+[*]
+charset=utf-8
+end_of_line=lf
+insert_final_newline=false
+indent_style=space
+
+[*.py]
+indent_style=space
+indent_size=4
+
+[lib/**.js]
+indent_style=space
+indent_size=2
+
+[{*.jshintrc}]
+indent_style=space
+indent_size=2
+
+[{package.json,.travis.yml}]
+indent_style=space
+indent_size=2