Feature Request: HMM Inference #20

What steps will reproduce the problem?
1.
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What is the expected output? What do you see instead?
I would like to see the exposure of the backward and forward algorithms to the 
CLI for HMM inference, including determine the backward, forward and posterior 
probabilities of states given sequence symbol, as the 
backward/forward/posterior function in the R's HMM package (see link below).

What version of the product are you using? On what operating system?
0.6.1; Windows 7


Please provide any additional information below.
http://cran.r-project.org/web/packages/HMM/HMM.pdf