Merge branch 'master' of git.gesis.org:dda/dda-wizard

README.MD

@@ -198,6 +198,11 @@ cd ~/git/dda-wizard/
 mvn
 ```
 
+If the first command (npm install) does not work out because of a customizr tarball validity then try the following instead:
+```
+npm cache clear --force && npm install --no-shrinkwrap --update-binary
+```
+
 Bower is used to manage CSS and JavaScript dependencies. You can upgrade dependencies by specifying a newer version in file `bower.json`. You can also run `bower update` and `bower install` to manage dependencies.
 Add the `-h` flag on any command to see how you can use it. For example, `bower update -h`.