[Azoth Murm] Message stubs.
[Azoth Murm] Removed unneeded default params.
[Azoth Murm] Not so dummy CreateMessage().
[Azoth Murm] Support sending messages.
[Azoth Murm] Ignore code 101 messages.
[Azoth Murm] Support storing message IDs.
[Azoth Murm] Support handling message code replies.
[Azoth Murm] Notify about message deliveries.
[Azoth Murm] VkEntry::FindMessage().
[Azoth Murm] Added Message{Flags,Info} to structures.h.
[Azoth Murm] Handle messages on connection level.
[Azoth Murm] User ID is negative on state changes.
[Azoth Murm] Send message request after scheduling.
[Azoth Murm] Ignore flag changes.