added termlabels getter for specific index (during ixfn rework)
module for generating ixfn - the project specific index functions
adding a testing/debug script for ixfn
adding default empty version of the top-level index-function module
changes to index resolution, moving from util:eval to ixfn (static generated project-specific functions)
adapted fcs:scan - moving from util:eval to ixfn-based apply-index; + further performance optimazations (termlabels not called every time in loop, just once before and passed as argument); all util:eval() should be eliminated
corrections to xpath generation, due to changes in index-module (it provides full path now)