[IMP] website_sale: details in order recap
[IMP] account: value_amount field  0-1 -> 0-100%
[IMP] sale,warning: usability
[IMP][website_mail] improved template designer, added support for background color, font color and bootstrap buttons(inline css) in mail designer,removed other snippet, changed snippet according to new format,added theme selector in mail_designer, lodeded snippets dynamically based on theme, added font-awesome support in mail snippets, added one controller which convert font-awesome to icon