perfcounters
perfcounters

Conflicts:
	src/clrzmq-ext/Device.cs
perf counters
Merge branch 'x64' of github.com:hconceicao/clrzmq2 into x64
Merge branch 'master' into x64

Conflicts:
	src/clrzmq-ext/Device.cs
	src/clrzmq/Counters/PerfCounterRegistry.cs
	src/clrzmq/Extensions/BaseListener.cs
	src/integration/Castle.Facilities.ZMQ/Internals.fs
fixed merge