Mention Python 3 in README.md
@@ -11,6 +11,8 @@ The full list of [contributors](http://github.com/GPflow/GPflow/graphs/contribut
GPflow implements modern Gaussian process inference for composable kernels and likelihoods. The [online user manual](http://gpflow.readthedocs.io/en/latest/) contains more details. The interface follows on from [GPy](http://github.com/sheffieldml/gpy), for more discussion of the comparison see [this page](http://gpflow.readthedocs.io/en/latest/intro.html#what-s-the-difference-between-gpy-and-gpflow).
+GPflow uses [TensorFlow](http://www.tensorflow.org) for runnin computations, which allows fast execution on GPUs, and is implemented in Python 3.
+
# Install
## 1) Quick install
