add ckanext-googleanalytics for page statistics.

[curioswati]

add steps to install the googleanalytics plugin:

pip install -e  git+https://github.com/ckan/ckanext-googleanalytics.git#egg=ckanext-googleanalytics
pip install -r ckanext-googleanalytics/requirements.txt

Add the plugin

ckan.plugins = ...... googleanalytics

Set these variables:

googleanalytics.id = UA-1010101-1
googleanalytics.account = Account name (i.e. justicehub.in, see top level item)
googleanalytics.username = [email protected]
googleanalytics.password = googlepassword