[json-glib] docs: Update the location of the repo and contribution links

[Emmanuele Bassi <ebassi src gnome org>]

commit c39e80c527840463a7bd165561def71d274ab7b0
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Jul 10 16:24:10 2017 +0100

    docs: Update the location of the repo and contribution links
    
    We're using Gitlab, now.

 README.md |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/README.md b/README.md
index 8225cdf..2149450 100644
--- a/README.md
+++ b/README.md
@@ -83,15 +83,19 @@ HACKING
 --------------------------------------------------------------------------------
 JSON-GLib is developed mainly inside a GIT repository available at:
 
-    https://git.gnome.org/browse/json-glib
+    https://gitlab.gnome.org/ebassi/json-glib/
 
 You can clone the GIT repository with:
 
-    git clone git://git.gnome.org/json-glib
+    git clone https://gitlab.gnome.org/ebassi/json-glib.git
 
 If you want to contribute functionality or bug fixes to JSON-GLib you can either
-notify me to pull from your Git repository, or you can attach patches for review
-to a bug on [the bug tracking system][bugzilla] using
+open a merge request on Gitlab:
+
+    https://gitlab.gnome.org/ebassi/json-glib/merge_requests/new
+
+or you can attach patches for review to a bug on [the bug tracking system][bugzilla]
+using:
 
     git format-patch master -k -s