Added cmake instructions

readme

@@ -27,13 +27,33 @@ The Zint project is committed to providing the open source community with encodi
 all public domain barcode standards. For this we need access to the standard documentation and,
 unfortunately, this is not free. Your donation will contribute towards the purchase of standard documents
 from ANSI. Standards which we hope to add to Zint in this way include Aztec Mesas, Code 49, 
-Supercode, Code One. If you have a preference regarding
+Supercode, Code One and many others.
-which standard you would like your donation to go towards then please let us know and we will reserve your
-donation for that standard.
 
 To donate to this project go to: http://sourceforge.net/project/project_donations.php?group_id=199350
 
 
+QT FRONT END
+------------
+
+This package includes a Qt4 GUI front end. This feature is still under development but if you would
+like to give it a try then here is how to get to it: You will need Qt4 and cmake to compile the code.
+cd to the folder that contains this README file then...
+
+mkdir 'build'
+cd build
+cmake ..
+make -j2
+
+This will make libzint library and a Qt specific version of the library. To install these do the following
+as root:
+
+make install
+
+You can then execute the Qt front end with
+
+./frontend_qt4/QZint_frontend
+
+
 CONTACT ME
 ----------
 
@@ -41,7 +61,7 @@ The home of libzint is
 
 http://www.sourceforge.net/projects/zint
 
-and a new home for information about Zint is under construction at:
+and the home for information about Zint is at:
 
 http://www.zint.org.uk