Non-Causal Bayesian Filter

Changed Bayesian filter to implement Terry’s new non-causal filter. Now
need to mess with the parameters to smooth out the curve.
Moved processEMG3 to old code

Now that we have non-causal Bayesian filter code, this is a little
outdated. Starting to do EMG analysis from the beginning again.
New PCA R code

Wrote code in R to do PCA analysis and calculate SNR