Haketilo

Facilitate installation of scripts from the repository

This commit includes:

• removal of page_info_server
• running of storage client in popup context
• extraction of some common CSS to a separate file
• extraction of scripts import view to a separate file
• addition of a facility to conveniently clone complex structures from DOM (in DOM_helpers.js)
• addition of hydrilla repo url to default settings
• other minor changes and of course changes related to the actual installation of scripts from the repo