[R-SIG-Finance] RBloomberg package rename

[John Laing]

The package formerly known as RBloomberg has been renamed Rbbg. As
this package is not formally affiliated with or endorsed by Bloomberg,
their lawyers have requested that we not reference the company by
name.

The existing package will continue to work, but its binaries are no
longer publicly available and all updates/bug fixes/new features will
be rolled into the new package. The new Rbbg can be installed like
this:
install.packages("Rbbg", repos = "http://r.findata.org")

Apologies for any inconvenience.

-John