Treat PxlIT as valid option, add SstIT turning useSst and activeSst
Introduced P2014a for Geom 2014a, added StiPxl, StiIst, PxlIT, IstIT and SstIT ; made PixelIT an alias of PxlIT (name convention was not respected)
Updated doc
Re-adjusted chain options for P2014
Backstep: Restore StiLibs, add StiLibsHft
Consolidate Sst/Ssd
Related doc
Reshaped options for the Hft - checked and should work
Updated doc