Fix setuptools installation

The packages argument was incorrectly specified, leading to an install
process that would appear to have succeeded, but would not actually copy
code.

The error likely occurred due to copying setup.py from another project
where the source files were located in a different position relative to
setup.py.

setup.py

@@ -32,4 +32,4 @@ Insert longer description here.
         'setuptools'
     ],
     scripts=scripts,
-    package_dir={modname:''})
+)