Converted files line endings
Added the apb_msg_type table and apb_msg.type_id column
Added type information on message, and read timestamp information on
message in subscription context
Added type parameter on the ChannelInterface::send() method
Fixed Drupal 7 backend
Fixed test and WIP on memory backend
Mino typo fixed (misplaced use statement)
Added type and read timestamp missing constants for sorting and
filtering on the CursorInterface
Added read timestamp and type unit testing (broken!)
Update read timestamp internal property of message when setting it to
read
Fixed read timestamp null values handling while reading message in
Drupal 7 backend
Fixed type propagation when creating memory message into various
subscriptions
Fixed read timestamp setup when updating MemoryMessage
Added sorting capabilities for type and read timestamp to memory backend
Added ordering for type and read timestamp into the Drupal 7 backend
Converted line endings to UNIX