Initial commit for using NPerf2. ReactiveUI bug

Detected bug in reactiveui. Unable to split ViewModel and its intarface.
Solved problem with ReactiveUI
Error handling and LoadAssemblyDialog added.
reference to NPerf2 library corrected
Loading tester and tested assemblies in treeview
Added ability to test few assemblies together
Added usage of AvalonDock
made large of changes. started better approach
Now able to run tests, but not finished yet
fixed wpf project loading error.
PerfTest parameters. Assemblies load/clear
Looks like mostly finished. Needs some review
old part removed
AppDomain.AssemblyResolve overrided
some negligible changes
use AssembliesManager to load assemblies
Calculate and show RunDescriptor in chart
removed private setters for Tools and Charts
updated packages