add sample for authenticating the nancy metrics module
add .net 40 to readme
Merge branch 'dev'
Merge branch 'master' of github.com:etishor/Metrics.NET
bump version, push to nuget
add possibility to specify number of threads to decrement each step in benchmark
make http listener more resilient to exceptions
Merge branch 'master' into dev

Conflicts:
	Samples/NancyFx.Sample/Program.cs
	Samples/NancyFx.Sample/SampleBootstrapper.cs
	Src/Metrics/Visualization/MetricsHttpListener.cs