Examples should be reworked

[kgevorkyan]

trafficstars

For now we use examples dir as test resources more and more actively, however we should show in examples only the main functionality of SAVE

All low level testing should be moved into corresponding place, to the resources and we need to adopt our tests to them

[orchestr7]

Very boring task, but needed to understand how save works and get suggestions from you on usages. I am sorry for this