Direct download link now links to latest release version

Also edited releaseCommon script to update the link in readme as well.
diff --git a/README.md b/README.md
index 0c84c75..d4afc81 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 Build status (on Travis CI) [![Build Status](https://travis-ci.org/philsquared/Catch.svg?branch=master)](https://travis-ci.org/philsquared/Catch)
 
-<a href="https://raw.githubusercontent.com/philsquared/Catch/master/single_include/catch.hpp">The latest, single header, version can be downloaded directly using this link</a>
+<a href="https://github.com/philsquared/Catch/releases/download/v1.6.1/catch.hpp">The latest, single header, version can be downloaded directly using this link</a>
 
 ## What's the Catch?
 
diff --git a/scripts/releaseCommon.py b/scripts/releaseCommon.py
index 14eb235..236bfbd 100644
--- a/scripts/releaseCommon.py
+++ b/scripts/releaseCommon.py
@@ -75,6 +75,8 @@
             f.write( line + "\n" )
 
     def updateReadmeFile(self):
+        versionParser = re.compile( r'\*v\d+\.\d+\.\d+\*' )
+        downloadParser = re.compile( r'<a href=\"https://github.com/philsquared/Catch/releases/download/v\d+\.\d+\.\d+/catch.hpp\">' )
         f = open( readmePath, 'r' )
         lines = []
         for line in f:
@@ -82,8 +84,7 @@
         f.close()
         f = open( readmePath, 'w' )
         for line in lines:
-            if line.startswith( "*v" ):
-                f.write( '*v{0}*\n'.format( self.getVersionString() ) )
-            else:
-                f.write( line + "\n" )
+            line = versionParser.sub( '*v{0}*'.format(self.getVersionString()), line)
+            line = downloadParser.sub( r'<a href="https://github.com/philsquared/Catch/releases/download/v{0}/catch.hpp">'.format(self.getVersionString()) , line)
+            f.write( line + "\n" )