Changing to the cloned directory added to README.md

Konrad Hinsen pointed out that this part was missing from the instructions
in `README.md' after cloning. So it is added.

1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index 6117361..3dd2757 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ received this source from arXiv, please see the respective section below.
 
 ```shell
 $ git clone XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+$ cd XXXXXXXXXXXXXXXXXX
 $ ./project configure
 $ ./project make
 ```