ClayFF consolidates into a single .off file in MS 6.0 and newer

From Materials Studio 6.0, one can consolidate typing, charging, and forcefield parameters into a single .off file.  We've taken advantage of this development in MS and consolidated the forcefield files for ClayFF for MatServer in Materials Studio. 

Also present in this form of ClayFF are corrections for some reported error in typing engine, and problem in charge assignment (getting non-zero total charge).