Merge pull request #163 from eodus/wcors

Various fixes for complex SSA
Shaped ESPRIT for Shaped 1dSSA
Yet another drop=FALSE
Add 1dESPRIT & shaped 1dESPRIT tests
Merge pull request #164 from eodus/shaped_parest

SSA parameter estimation for shaped case
Fix tls.solve
Fix neig autoselect for circular 2dSSA
Add circularity for ESPRIT
Add circular 1d & 2d ESPRIT tests