another minor fixup to FstatMethod patch

- patch 7a24fb54cefd54866b7850458d28b138e69ca833 had invald default value
  "best" for --FstatMethod, fixed to "DemodBest"
- refs #543
CFSv2: simplified and cleaned up timing info output

- drop unused transient timings output for now
- added Fstat-method info and number of frequency bins to timing file