merci 7.x-2.0-rc1

Changes since 7.x-2.0-beta2:

• Fixed issue #1657870 by adamtong: MERCI Calendar View problem
• #1565924 by svvlaere: Undefined language in MERCI. langcode for field field_merci_date is always LANGUAGE_NONE as it is not translatable. Also language default was not set for item placeholders. Will now use same language as the parent reservation.
• Ported from D6 to D7 issue #1512294 by iPeat: Added validation which prevents a reservation from being checked out if any of the items are currently checked out at any time.
• Ported from D6 to D7 issue #1494836 by iPeat: No Show cron changes all reservations to No Show not just the past ones.
• Ported from D6 to D7 issue #1489812 by iPeat: Can't change a reservation - Conflicting with itself when revisions are enabled. Also fixes reservation conflict without revisions when an item is checked back in early.
• Minor typo from last update.
• Ported from D6 to D7 issue #1494788 by iPeat: Item Reservation Status not functioning in inventory shows wrong check out status.
• #1525348 by vlkff: Notices while updating merci nodes not from the node_form Issue #1513270 by Aryca: Can´t change status for a reservation.
• #1513944 by franz: Views declarations need proper fixing to avoid warnings