0.4

• Major performance improvements
• AMQP messages are now compressed using LZ4
• TelepatIndexedLists is a data structure on redis used to rapidly search
  for members
• Simpliefied the database adapter, now they can be used in bulk operations
• Device IDs are no longer stored in subscriptions, instead their tokens
  are stored in order to avoid retrieving the device object everytime
• Filter builder is used by database adapters in order to form filters
  for querying the database
• Moved some of the logic from the old adapter's functions to functions
  in Admin/Context/Model/etc