add alternative approach from 2013-01
-rw-r--r-- 42 .gitignore
-rw-r--r-- 504 DESCRIPTION
-rwxr-xr-x 101 NAMESPACE
drwxr-xr-x - R
-rwxr-xr-x 849 README.md
drwxr-xr-x - data
drwxr-xr-x - inst
drwxr-xr-x - man
drwxr-xr-x - src