PD-side Lua has callbacks unimplemented

[jwise]

At least the idle callbacks, the mobile callbacks, the available message callbacks, and the away message callbacks certainly need to be implemented. Probably more.

[jwise]

Added im_buddyflags, idle info, and status info in 998a416.

[jwise]

Apparently pressing 'e' means 'close issue' in github. Oops.