Hi,
first go to the folder where you extracted your archive.
Then for developing purpose do the following :
<PATH_TO_PYTHON_EXECUTABLE>/python setup.py develop
If you just want to try out your application out of the box :
<PATH_TO_PYTHON_EXECUTABLE>/python setup.py install
Of course <PATH_TO_PYTHON_EXECUTABLE> means the python executable file path used to install nagare or the one of your virtualenv (dunno how you installed it).
Hope this helps.