Configure EditorConfig for "py,yaml,yml" and Makefile (#307)

Author: jbampton

.editorconfig

@@ -8,3 +8,14 @@ charset = utf-8
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
+
+[*.py]
+indent_size = 4
+indent_style = space
+
+[*.{yaml,yml}]
+indent_size = 2
+indent_style = space
+
+[Makefile]
+indent_style = tab