Add http://EditorConfig.org configuration

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

.editorconfig

@@ -0,0 +1,20 @@
+# EditorConfig configuration for pacman
+# http://EditorConfig.org
+
+# Top-most EditorConfig file
+root = true
+
+# Unix-style newlines without trailing whitespaces, but with a newline
+# ending every file, utf-8 charset, set indent to tabs
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = tab
+
+[NEWS,HACKING]
+indent_style = space
+
+[*.py]
+indent_style = space

HACKING

@@ -11,13 +11,8 @@ Coding Style
 
 1.  All code should be indented with tabs. (Ignore the use of only spaces in
     this file.) A tab size of two spaces is used when calculating line widths,
-    which should be a maximum of 80 characters. By default, source files
-    contain the following Vim modeline:
-+
-[source,C]
--------------------------------------------
-/* vim: set noet: */
--------------------------------------------
+    which should be a maximum of 80 characters. An EditorConfig file is used
+    to set this project-wide default.
 
 2.  When opening new blocks such as 'while', 'if', or 'for', leave the opening
     brace on the same line as the beginning of the codeblock. The closing brace