Update readme

readme.md

@@ -13,10 +13,15 @@ to the CC-BY-SA licence.
 Other document are subject to the GNU GPLv2 except if another licence
 is precised in the header.
 
+# Clone Patacrep repos
+
+>     git clone git://github.com/crep4ever/songbook-core.git
+>     git clone git://github.com/crep4ever/songbook-data.git
+>     mv songbook-data songbook-core/songs
+
 # Run
 
->     git clone git://github.com/crep4ever/songbook-client.git
+>     cd songbook-core
->     cd songbook
 >     ./songbook.py -s <songbook_file.sb>
 >     <pdfreader> <songbook_file.pdf>