fix travis build
revert ti xunit 1.9 (2.0 fails on travis & appveyor)
bump version for Owin.Metrics and re-publish
fix path in create-nuget.bat for Nancy and Owin adapters
re-publish owin metrics
Merge branch 'master' into net40

Conflicts:
	Src/Metrics.Tests/packages.config
	create-nuget.bat
fix build script