[FIX] server: db service, fix the filestore copy when duplicating a database
[IMP] menuitems cleanups

Remove Tools
Move cron, action rules and subscription to Automation
Move and rename ir_property models to Parameters
[FIX] phantomjs test remove injection

It's now deprecated, assets bundles should be used instead.
MERGE] odoo bus, im_chat and im_livechat

Add a generic bus for instant communication based on postgres LISTEN/NOTIFY and HTTP comet.
Both threaded and gevent greenlet mode are supported. Chat should now work on every platform.

im_chat improvements
- proper support for multiple windows
- present, away and offline status
- improved data model for multi user chat session

im_livechat improvements
- standard css js assets are now used
- qweb templates are now used instead of jinnja
[FIX] website snippet editor initialisation
[IMP] l10n_cn: upgrade to 1.8, including small business chart

Also removed empty translation files.

This is a manual rebase of PR #802
Merge pull request #823 from sebalix/master-fix-db-duplicate

[FIX] dbmanager duplicate db, use shutil.copytree to duplicate the filestore
[IMP]account: Remove sales pricelist group from account configuration wizard.
[IMP]base_setup: change onchange name onchage_module_multi_company.
[IMP]sales_team: set multi sales team true for demo users.
[IMP]hr: Add hr_attendance groups in hr module.
[REM]hr_attendance: Remove hr attandance configuration wizard