Make IndexResult always point to the start of the matched value

[V0ldek]

Is your feature request related to a problem? Please describe.
Currently the IndexResult (and the -r bytes mode) return byte offsets that are "somewhere near" the matched value. This is pretty much useless for any serious application.

Describe the solution you'd like
It should always return the first byte of the matched value, be it the opening character of a complex subdocument, or the first character of an atomic value.

Additional context
Here's the values that are returned now:

• For an empty query, the opening brace or bracket is returned, and atoms are ignored (see Atomic roots are not given as a result for an empty query $ #160).
• For items that are located in an object, the colon of the matched key is returned.
• For arrays:
  • an atom that is the first element gets the index of the opening bracket...
  • ... but a complex objects gets its opening character;
  • an atom that is a later element gets the index of the preceding comma...
  • ... but, again, complex objects get the opening character.

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[V0ldek]

Not fixed.

[V0ldek]

#170 fixes this