Add cachebooster.js

Update all link/script tags with add a Date.now() in the end of
href/src attributes
Update html and add cachebooster screenshot
update readme
update readme
Defaults processing "scripts" is not performed

You should change the variable "process_scripts" to true to run this
Rename to cachebuster
Rename to cachebuster
add cachebuster snippet
add html_i18n_content.js to index page