Rework editorconfig

* Most file types prefer 2-space indents, so now default
  to that and list the exceptions
* Add max_line_length=120 for .py files (Django convention)
* Bat files require CRLF

.editorconfig

@@ -1,24 +1,25 @@
-# http://editorconfig.org
+# https://editorconfig.org
 
 root = true
 
-# Follow Django conventions for most files
 [*]
 charset = utf-8
 end_of_line = lf
-indent_size = 4
+indent_size = 2
 indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-# Use 2 spaces for js and text(-like) files
-[*.{html,js,json,md,rst,txt,yml}]
-indent_size = 2
+[*.py]
+indent_size = 4
+max_line_length = 120
 
-# Makefiles always use tabs for indentation
-[Makefile]
+[*.{ini,lock}]
+indent_size = 4
+
+[{Makefile,*.bat}]
 indent_style = tab
+indent_size = 4
 
-# Batch files use tabs for indentation
 [*.bat]
-indent_style = tab
+end_of_line = crlf