Function ScoreOneScriptSpan

Score one scriptspan into doc_tote and vec, updating scoringcontext Inputs: One scriptspan of perhaps 40-60KB, all same script lower-case letters and single ASCII spaces. First character is a space to allow simple begining-of-word detect. End of buffer has three spaces and NUL to allow easy scan-to-end-of-word. Scoring context of scoring tables flags running boosts Outputs: Updated doc_tote giving