[Azoth] Removed unused ImageRegexp_.
[Azoth] Count ' as a possible attr marker.
[Azoth Murm] Handle emoji in unformatted version as well.
[Azoth Murm] Added PhotoInfo.
[Azoth Murm] VkConnection::GetPhotoInfos().
[Azoth Murm] Fixed PhotoInfo datatypes signedness.
[Azoth Murm] VkEntry stubs.
[Azoth] Added IUpdatableChatEntry interface.
[Azoth] Handle performJS() signals.
[Azoth Murm] Handle photo infos displaying them in chats.