[Azoth] Moved markdown parser to Azoth core.
[Azoth Abbrev] Fixed a typo.
[Azoth MuC] Added /presence command for #1691.
[Azoth] Moved CustomState to azothcommon.h as CustomStatus.
[Azoth] Added IProxyObject::FindCustomStatus() for #1691.
[Azoth MuC] Support setting custom statuses for #1691.
[Azoth] Check if after-command symbol is any whitespace.

Not only ' ' counts.