The main issue is that I have removed type='FORK' everywhere it
clearly produced issues. I should probably do that in presc, too.

Finally plotting works nicely.

* R/run.R(presc.do): New function. Top level prescreening function.

* NAMESPACE: New exports.

* man: Update doc.

* README.org: New file.

* R/run.R(sw.do): Move call to makeCluster.

* R/mix.R(mb.p): New function. Parallel version of mb.v

* R/run.R(mb.do): New argument.
  [proc]

* R/run.R(sw.do): New argument.
  [proc]

* man/sw.do.Rd: Update docs.

* R/mix.R(single.sw): Changed lastStep to 7. Need to revert in the
  next commit.
  (v,p.sw): Added combine capability.

* R/run.R(sw.do): Extended to support combine.

* man(p.sw.Rd,sw.do.Rd,v.Rd): Updated documentation.