update the SPR latex document
update the SPR latex document

the wording in this document
was from before the completion
of the first working apf/spr code.
updated its contents to reflect
the current state
(including this morning's changes)

yangf4/core,YetAnotherMinion/core,YetAnotherMinion/core,YetAnotherMinion/core,yangf4/core,yangf4/core,yangf4/core,YetAnotherMinion/core,YetAnotherMinion/core,yangf4/core