[FIX] account_anglo_saxon: correctly set the accounts for returns

The generated moves on a return should be the reverse of the outgoing move.
Fixes #1817, opw 604417
[FIX] mail: chatter read more/less expand first oe_msg_body_long/short in the first oe_msg_body

Otherwise, if the mail itself contains a oe_msg_body_long (because sent in the mail history), it will open that one
[FIX] stock/purchase: dates and currency rates

Use the currency rate of the purchase date instead of the one of at the reception time (opw 610430)
[FIX] hr_timesheet_sheet: avoid error when sort attendances

When an attendance line is edited, the tuple has no key 'name' which lead to a traceback.
Fixes #546
[FIX] [CLEAN] Various: fixed / cleaned use of dict.fromkeys.

Indeed using fromkeys with a list / dict as argument leads to the creation
of shared list / dict. This could create some ugly side effects when
used in loops. This commit fixes or cleans this kind of statement to avoid
unwanted side effects.
[FIX] Package: Debian: finally a correct Packages generation
[I18N] Update translations from Launchpad branches
[FIX] update autocomplete test

Autocompletion of many2one fields only accepts domains in the form of
arrays, not as strings.
[FIX] Package: split the version to not include the latest commit's hash included by the package script
[FIX] stock_account: accept negative quantities on standard price

The qty_available available of a product can be negative (e.g. using the force availibility button on delivery order) and the generated account.move.line should be adapted (otherwise getting negative values in debit/credit entries).
Fixes #2475
[REL] Odoo 8.0
[FIX] survey: display_mode is required if question type is simple_choice

Fixes #2461
[FIX] survey: typo in domain
[FIX] mrp_repair: pass context in product_id_change calls
[FIX] kanban: wrong condition to reset the dataset index

The dataset index should be reset either if the dataset is empty or the index is greater than the records size
[MERGE] forward port of branch 7.0 up to a218a9e
[MERGE] forward port of branch saas-3 up to 5bd0249
[FIX] Previous move subtleties
[IMP] Still need previous unreserve depending on pack ops
[IMP] Assign all destination moves at once