[meld] Add information on required build tools to README

[Kai Willadsen <kaiw src gnome org>]

commit 7c068660da9f7f9f9cf2a846228f3949fca3bbd7
Author: Jesse Sheridan <jesse sheridan gmail com>
Date:   Tue Mar 15 06:05:47 2016 +1000

    Add information on required build tools to README

 README |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/README b/README
index 726cb2a..e0a6c15 100644
--- a/README
+++ b/README
@@ -72,6 +72,8 @@ command. In other words, do this:
 
     python setup.py install --no-compile-schemas
 
+If you are building on Ubuntu, you will need intltool and itstool packages which can be installed with:
+    sudo apt-get install intltool itstool
 
 Contacting
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