fixed issue in owin metrics whereby global metrics were not serialised in json endpoint
Merge remote-tracking branch 'upstream/dev' into dev
bumped owin metrics nuget version
Merge pull request #32 from alhardy/dev

Fixed issue with global metrics in owin adaptor
rename json builders
add possibility to attach an existing context
rename json builders
add internal metrics
make json health checks handling consistent with metrics handling
refactor MetricsHttpListener to handle gzip compression
use internal metrics in sample
add endpoint versioned health status
use MetricsDataProvider instead of context
serve flot app gzipped
use metrics data provider instead of context in metrics endpoint
failed health chck should return 500 status code
Merge remote-tracking branch 'upstream/dev' into dev

Conflicts:
	Src/Adapters/Owin.Metrics/Middleware/MetricsEndpointMiddleware.cs
fix NaN gauge json serialization
add test for exceptions in gauge functions
Merge pull request #36 from alhardy/dev

Unhealthy check should return 500 http status code