Add Time Independent Correlation Analysis

[drroe]

Add TICA functionality as a cpptraj analysis. Can be though of as PCA with a time lag.

See e.g. http://docs.markovmodel.org/lecture_tica.html

https://scholar.google.com/scholar?q=time-lagged+independent+correlation+analysis&hl=en&as_sdt=0&as_vis=1&oi=scholart

[drroe]

Should be addressed by #1075