gen.Gamma: Generate t.p.m. to approximate HSMM with HMM
In benaug/move.HMM: Fit HMM and HSMM animal movement models

This function generates a t.p.m. of a HMM that approximates a HSMM (see Langrock and Zucchini, 2011)

1	gen.Gamma(m, params, PDFs, CDFs)

`m`	vector of length nstates indicating the number of states to be in each state aggregate (see Langrock and Zuchinni 2011).
`params`	A list of length ndist+1 containing matrices of starting parameter values. If nstates=2, the first element of the list must be the starting values for the dwell time distribution. If nstates>2, the first element must be the starting values for t.p.m., which must have 0's on the diagonal and rowSums=1.
`PDFs`	A list of PDFs for the ndist distributions.
`CDFs`	A list of CDFs for the ndist distributions.