Aggregation of buildings#6

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klokan wants to merge 7 commits intoklokantech:buildingsfrom

jeleniste:aggregation_of_building

Commits on Apr 30, 2018

Commits on May 15, 2018

tolerance from zres and renaming of table with blocks
jeleniste
committed

Commits on May 16, 2018

transformed to matview
jeleniste
committed

Commits on May 25, 2018

Commits on Jun 1, 2018

remove cleaning after previous versions
jeleniste
committed