The best way to install Venne:CMS is create new project using Composer:
composer create-project venne/sandbox:2.0.x-dev myApp && cd myApp
composer require venne/cms-module:2.1.x [--prefer-dist]
php www/index.php venne:module:update
php www/index.php venne:module:install cms [--noconfirm]
composer require [name:version]
Module can be installed manualy. Download archive from GitHub and unpack it into /vendor/venne.
php www/index.php venne:module:list # List modules
php www/index.php venne:module:update # Update local database of modules
php www/index.php venne:module:install <name> # Install module
php www/index.php venne:module:uninstall <name> # Uninstall module
php www/index.php venne:module:upgrade <name> # Upgrade module
composer require venne/sample-module:2.0.x [--prefer-dist] # Download module
php www/index.php venne:module:update # Update local database of modules
php www/index.php venne:module:install sample # Install module