Add editorconfig

.editorconfig

@@ -0,0 +1,35 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+max_line_length = 80
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.rst]
+max_line_length = 80
+
+[*.py]
+max_line_length = 100
+
+[*.{scss,html}]
+indent_size = 2
+indent_style = space
+max_line_length = 120
+
+[*.js]
+indent_size = 2
+max_line_length = 120
+
+[*.yml]
+indent_size = 2
+
+[Makefile]
+indent_style = tab