Switched Scala version to 2.12.2, the most recent stable version. It
will now require Java 1.8.
Fixed existing uses of deprecated features.
Removed the `uvm.clientsupport` package. This package was intended to
help Mu clients build text-based Mu IR bundles. However, we started
using the IR Builder API instead, and the `uvm.clientsupport` package
remained unused. The same capability can be provided by the
provided a non-SSA-to-ssa converter, which can be useful for clients.
If there are needs of resurrecting that feature, please checkout the