BicMix v1.0.0

Modifications from the original BicMix version:

• Added command line options to allow user-specification of
  • Model priors (--a, --b, --c, --d, --e, --f, --alpha, --beta)
  • Max variational EM iterations (--itr)
  • Warm start interval (--interval)
  • Output interval (--output-interval)