need a robust way to import HMM parameters

[awillats]

Currently parameters are hardcoded, then can be overwritten through the GUI.

But this isn't good enough, and is especially hacky for >2 state HMMs

Requirements:

• this needs to be accessible from rtxi-hmmGenerator and Decoder

Proposed solutions:

• simple: text -> std::vector (vector of vectors)
  • a version of this exists in the legacy folder (see legacy / dataFuns.cpp / pullParamLine() )
• more robust / heavier: load from matio
  • matioStimLd is probably the right template for this

[awillats]

notably pullParamFromLine relies on importing a matrix as a vector then reshaping it