Scoring & weights not implemented

[Paul J. Lucas]

The full-text scoring & weight feature is not implemented. This causes the following W3C XQFTTS tests to fail:

examples-23-q1
examples-23-q2
examples-23-q3
examples-23-q4
examples-23-q5
examples-231-q1
ft-3.2-examples-q5

ForScoreExpr-1
ForScoreExpr-2
ForScoreExpr-3
ForScoreExpr-4
ForScoreExpr-5
ForScoreExpr-6
ForScoreExpr-BadVar1
ForScoreExpr-BadVar2
ForScoreExpr-unconstrained-1
ForScoreExpr-unconstrained-2
ForScoreExpr-unconstrained-3
ForScoreExpr-unconstrained-4
ForScoreExpr-unconstrained-5
ForScoreExpr-unconstrained-6
ForScoreExpr-unconstrained-Var1
ForScoreExpr-unconstrained-Var2
ForScoreExpr-unconstrained-Var3
ForScoreExpr-Var1
ForScoreExpr-Var2
ForScoreExpr-Var3
LetScoreExpr-1
LetScoreExpr-3
LetScoreExpr-4
LetScoreExpr-unconstrained-1
LetScoreExpr-unconstrained-3
LetScoreExpr-unconstrained-4

FTSelection-Weight-q1a
FTSelection-Weight-q1b
FTSelection-Weight-q1c
FTSelection-Weight-q1d
FTSelection-Weight-q1e
FTSelection-Weight-q1f
FTSelection-Weight-q1g
FTSelection-Weight-q1h
FTSelection-Weight-q2a
FTSelection-Weight-q2b
FTSelection-Weight-q3
FTSelection-Weight-unconstrained-q1d
FTSelection-Weight-unconstrained-q1e
FTSelection-Weight-unconstrained-q1f
FTSelection-Weight-unconstrained-q1g
FTSelection-Weight-unconstrained-q1h

score-queries-results-q1
score-queries-results-q2
score-queries-results-q3
score-queries-results-q3b
score-queries-results-q4
score-queries-results-q5
score-queries-results-q6

[Sorin Marian Nasoi (sorin.marian.nasoi)]

Marked with Resolution = None at Dana's request.