[Azoth Murm] Fixed Attaches_ naming.
[Azoth Murm] Use Util::Stlize().
[Azoth Murm] Refactored contents building to ToMessageContents().
[Azoth Murm] Don't double-set message text body.
[Azoth Murm] Don't request full msg info in vain.
[Azoth Murm] Refactored replacements to PerformReplacements().
[Azoth Murm] Take ICoreProxy_ptr by const ref.
[Azoth Murm] Refactored parts of code to FullInfo2Replacement().
[Azoth Murm] Recursive FullInfo2Replacement().
[Azoth Murm] Refactored some code into HandleBasicMsgInfo().
[Azoth Murm] Handle basic info for source message as well.