optional insert operation#15

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dmitryuv wants to merge 3 commits intoottypes:masterfrom

dmitryuv:optional_inserts

Commits on Apr 25, 2014

optional insert operation
dmitryuv
committed

Commits on Jun 26, 2014

fixed randomizer test for "oin" operation
dmitryuv
committed

Commits on Jun 27, 2014

separate 'oin' test from 'oi'
dmitryuv
committed