[IMP] website.snippet: create automatically the thumbnail; data-option became data-js; add data-eval method; rename check_class into toggle_class
[FIX] website.snippet: the background option is not readily usable by the designer
[IMP] Bundle invalidation won't use watchdog afterall
[IMP] refactor bundle ir.attachment cache invalidation
[IMP] account_budget: default value

Adding a context which ease budget encoding as really often, creating a budget means the associated budget lines will follow the same start and end dates. Passing the context allow budget lines automatically have the budget's start and end date
Merge pull request #2050 from odoo-dev/master-theme-review-chm

[IMP] website.snippet: create automatically the thumbnail; fix background
[IMP] Project : onboarding tips to show what you can get with project and task builder.