Added DIT and IBS search benchmarks
Merge branch 'master' of https://github.com/lundmikkel/C5

Conflicts:
	C5.Performance.Wpf/Benchmarker.xaml.cs
Merge branch 'master' of https://github.com/lundmikkel/C5

Conflicts:
	C5.Performance.Wpf/C5.Performance.Wpf.csproj
Readded IBS and DIT searches after merga