Add Bazel build files.

[jons-pf]

These changes enable using BIEST via the Bazel build system.

Use it by including this (or a later commit) in your WORKSPACE.bazel:

http_archive(
  name = "biest",
  urls = [ "https://github.com/jons-pf/BIEST/archive/cf598bc122dbba4c28096e003e029a3cb9f2c187.zip" ],
  strip_prefix = "BIEST-cf598bc122dbba4c28096e003e029a3cb9f2c187",
  sha256 = "5451c6aa2cb5de3c9219979c7e9fdc372aff1dfb619994396cad540721eb7029"
)

and then put the following in the deps of the artifact which uses BIEST:

"@biest//include:biest",

Ideally, a new release of BIEST would be done once this is merged
to allow referencing the release instead of the commit ID in the http_archive dependency declaration.

Currently, SCTL is used from a stand-alone build available here:
https://github.com/jons-pf/SCTL/tree/add_bazel