[tracker/thunderbird] thunderbird: Update README file

[Martyn James Russell <mr src gnome org>]

commit b57c2cef961cc8034529c085c393a26d2d9e337a
Author: Adrien Bustany <adrien bustany nokia com>
Date:   Thu Jul 28 14:26:42 2011 +0300

    thunderbird: Update README file

 src/plugins/thunderbird/README |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/thunderbird/README b/src/plugins/thunderbird/README
index 834b3ca..3310045 100644
--- a/src/plugins/thunderbird/README
+++ b/src/plugins/thunderbird/README
@@ -1,5 +1,14 @@
-A simple Thunderbird extension to export mails to Tracker. Currently only mail
-headers are exported, not mail body.
+A simple Thunderbird extension to export mails to Tracker.
 
 === How to build a .xpi file ===
-Just run: git archive --format=zip HEAD > trackerbird.xpi
+From the src/plugins/thunderbird folder, run
+git archive --format zip HEAD > tracker-thunderbird.xpi
+
+=== How to test the extension without installing it ===
+This method makes development much easier, since it avoids the hassle of
+rebuilding the XPI everytime a change is made in the code:
+In your Thunderbird profile directory, locate the extensions folder. In that
+folder, create a file named trackerbird bustany org  In that file, put the full
+path to the thunderbird plugin source folder, for example
+/home/foobar/Projects/tracker/src/plugins/thunderbird/
+Note the trailing slash, it MUST be included for this method to work.