Remove global map of contexts, use request.Context()#79

Merged

beorn7 merged 5 commits intoprometheus:masterfrom

tomwilkie:ues-request-context

Apr 18, 2017

Commits on Apr 8, 2017

Commits on Apr 12, 2017

Revert "Split implementation for pre-go1.7 and go1.7, such that route package contexts work for both."
tomwilkie
committed

Commits on Apr 17, 2017

Remove go 1.5 & 1.6 from travis.
tomwilkie
committed