on main page, link "free (open source)" to git repo instead of license

content/index.txt

@@ -3,11 +3,11 @@ Quantum transport simulations made easy
 
 **Update 15 Dec 2014**: Kwant is going to be one of the main tools in a massive open online course on `topology in condensed matter <http://tiny.cc/topocm>`_. The course will start in February, sign up!
 
-Kwant is a `free (open source) </license.html>`_ Python package for numerical
-calculations on tight-binding models with a strong focus on quantum transport.
-It is designed to be flexible and easy to use.  Thanks to the use of innovative
-algorithms, Kwant is often faster than other available codes, even those
-entirely written in the low level FORTRAN and C/C++ languages.
+Kwant is a `free (open source) <http://git.kwant-project.org/kwant>`_ Python
+package for numerical calculations on tight-binding models with a strong focus
+on quantum transport.  It is designed to be flexible and easy to use.  Thanks to
+the use of innovative algorithms, Kwant is often faster than other available
+codes, even those entirely written in the low level FORTRAN and C/C++ languages.
 
 Tight-binding models can describe a vast variety of systems and phenomena in
 quantum physics.  Therefore, Kwant can be used to simulate metals, graphene,