Implement `Span::Log()` using annotations#18

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jmcomets wants to merge 3 commits intornburn:masterfrom jmcomets:logs

+70-18

Commits on Apr 13, 2018

Implement Span::Log() using annotations
jmcomets
committed

Commits on Apr 17, 2018

fixup! Review fixes
jmcomets
committed

Commits on Apr 20, 2018

fixup! setValue shouldn't write only strings
jmcomets
committed