Thoughts on how it could work:

php piwik test # run all test groups 
php piwik test integration
php piwik test core
php piwik test TreemapVisualization

php piwik generate plugin MyPlugin
php piwik generate plugin MyPlugin "my description"
php piwik generate api MyPlugin
php piwik generate controller MyPlugin
php piwik generate tests MyPlugin

php piwik archive
php piwik archive --url=http://localhost/piwik

• forwarding parameters
• strtolower parameters

In 6922014: refs #4121 added simple command line tool including a not yet working tests and generatePlugin command

In ce23c48: refs #4121 make sure we are in cli mode

In 2c53bdb: refs #4121 command to generate plugin and theme, command to run tests

In 08bab7f: refs #4121 fix create plugin does not work in case the pluginname was entered wrong at least once

In c3bf94f: refs #4121 adjust message depending on whether it is theme or plugin

In aae467d: refs #4121 added possibility to specify group as an argument like ./console tests Core

In 0ceb094: refs #4121 make sure to execute a command only if in cli mode

In 5bfa070: refs #4121 added possibility to generate API for a specific plugin

In ad2ff1d: refs #4121 added possibility to create controller, all files within the template folder will be copied now

In e65ef12: refs #4121 added simple parameter and example link

In e217596: refs #4121 added possibility to create API and Controller along with the plugin

In a12ae95: refs #4121 code cleanup and copy plugin/theme folder if needed

In 0f27dc4: refs #4121 added example hook including javascript file when generating a plugin

In 5d5551d: refs #4121 copy readme/howto when generating a plugin/theme

In 429af6d: refs #4121 renamed tests command to tests:run. Some other minor tweaks

Awesome work Thomas!

@diosmosis maybe you can incorporate the Plugin file generator super-tricks in the docs plan (and update the files used as templates)