[gedit-plugins] Add a help HACKING file

[Ekaterina Gerasimova <egerasimov src gnome org>]

commit 3dcfcce6e05af7b464840c1734808449349bd0ce
Author: Ekaterina Gerasimova <kittykat3756 gmail com>
Date:   Sun May 19 12:43:32 2013 +0100

    Add a help HACKING file
    
    The HACKING file explains about the broken links and index.page (and any
    other oddities that will arise from this help being installed in the
    gedit help).

 help/C/HACKING |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/help/C/HACKING b/help/C/HACKING
new file mode 100644
index 0000000..611f6d0
--- /dev/null
+++ b/help/C/HACKING
@@ -0,0 +1,6 @@
+This help is installed into the gedit help when the gedit-plugins is installed.
+Links do not validate because they link to pages in the gedit help (these work
+after installation). Check these before every release.
+
+The dummy index.page is needed for module statistics on
+https://l10n.gnome.org/module/gedit-plugins/