[Slashcode-development] Message plugin changes

[shane <sh...@lo...>]

FYI, If you've ever written a plugin that uses Slash::Messages, as of  
T_2_5_0_143 the schema's changed. It now uses a  
message_deliverymodes. If you update your install to that tag or  
later w/o modifying your code, well, bad things may happen ;)

  Shane