[BioC] Rgraphviz (news, testing)

[Kasper Daniel Hansen]

A new version of Rgraphviz has been committed and binaries on all
platforms are available.  Latest version is 2.1.2.

The major change in this version is that Graphviz is now bundled with
Rgraphviz.  Rgraphviz no longer depends on any external programs, and
is now as easy to install as any other package.  This includes 64 bit
Windows.

Testing on various platforms would be highly appreciated.  Please tell
us if you have problems building from source or using the binaries.

A more detailed announcement will follow when we believe the current
code has been thoroughly tested, and a few remaining issues has been
addressed.

Best,
Kasper Daniel Hansen