Added 2D mode to Points inside Mesh

Слиты nikitronn запросил слияние github/fork/vicdoval/point_inside_2d в b28_prelease_master

Created by: vicdoval

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  • Code changes complete.
  • Code documentation complete.
  • Documentation for users complete (or not required, if user never sees these changes).
  • Manual testing done.
  • Unit-tests implemented.
  • Ready for merge.