[epiphany] HACKING: remove dubious guideline, add guideline for headers

[Xan Lopez <xan src gnome org>]

commit e7fa362332fd9dae8ade423e12c24bb3ab1d3ac6
Author: Xan Lopez <xlopez igalia com>
Date:   Sat Sep 3 18:30:59 2011 +0200

    HACKING: remove dubious guideline, add guideline for headers

 HACKING |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/HACKING b/HACKING
index a768611..ccaf382 100644
--- a/HACKING
+++ b/HACKING
@@ -1,15 +1,17 @@
 In order to keep the code nice and clean we have a few requirements you'll
 need to stick to in order to get your patch accepted:
 
-- use 2-space no-tabs for indentation (mandatory on new files, old ones will
+- Use 2-space no-tabs for indentation (mandatory on new files, old ones will
   be re-indented eventually. When modifying an existing file with 8-space
-  indentation keep the old style please)
-- Use K&R style for the braces
+  indentation keep the old style please).
+- Use K&R style for the braces.
 - No braces for one line control clauses.
-- please compare with NULL or FALSE isntead of using "!"
-- callback functions have a suffix _cb
-- all files have to be encoded in UTF-8
+- Callback functions have a suffix _cb.
+- All files have to be encoded in UTF-8.
 - Use char/int/double/..., not gchar/gint/gdouble/... types.
+- All implementation files must include first "config.h", followed by
+  the primary header, followed by a blank line, followed by all the
+  other headers sorted alphabetically.
 
 - data/kr-gnome-indent.cfg is provided as a reference config file for the
   uncrustify program to get correct indentation in new files.