Add .editorconfig

Author: peterkuma

.editorconfig

@@ -0,0 +1,11 @@
+root = true
+[*]
+end_of_line = lf
+insert_final_newline = true
+[{*.py,*.pyx,*.ronn,bin/ccplot}]
+charset = utf-8
+indent_style = space
+indent_size = 4
+tab_size = 4
+trim_trailing_whitespace = true
+insert_final_newline = true