LUCIDDB:  mention IRC channel in README
LUCIDDB:  mention IRC channel in README

[git-p4: depot-paths = "//open/dev/": change = 13123]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb