Improved db:create to re-open connections after they've been closed.
Fixed improper equality checks.
Fix typo: port.png is used instead of import.png.
Sync latest mudlet-lua.

Merge remote-tracking branch 'mudlet-lua/master' into development
Update to latest mudlet-mapper, from 12.12.3 to 14.6.1.
Merge pull request #154 from ahmedcharles/import

Fix typo: port.png is used instead of import.png.
Remove dead stats code from AliasUnit.
casts
get url
TMap::vertex
foo
Setup memory leak checking on MSVC in debug builds.
Add a feature for debug builds to prompt to attach a debugger.
Avoid macro max/min with parentheses.
Remove luazip lua bindings on windows.
Update to Communi 1.2.1, which is the new version of the irc library.
Make mpConsole in Host into a QPointer, so it is set to null whenever it is deleted.
Don't access mpConsole if it is null.
In situations where something tries to access mudlet (the class), after it is destructed, make it easier to tell what is going on.
Make HostManager a member of mudlet (the class) rather than a global singleton so that its lifetime is better understood.