Testing various alternative view engine implimentations

• XmlView - original Suave style template
• GiraffeView - struct/enum variation
• ByteView - lightweight streamwriter nodes
• TemplateView - Alt syntax templateing engine of compiled components

1 - using memory stream to assess raw performance without IO

BenchmarkDotNet=v0.10.11, OS=Windows 10 Redstone 3 [1709, Fall Creators Update] (10.0.16299.192)
Processor=Intel Core i7-4770K CPU 3.50GHz (Haswell), ProcessorCount=8
Frequency=3415989 Hz, Resolution=292.7410 ns, Timer=TSC
.NET Core SDK=2.1.4
  [Host]     : .NET Core 2.0.5 (Framework 4.6.26020.03), 64bit RyuJIT DEBUG
  DefaultJob : .NET Core 2.0.5 (Framework 4.6.26020.03), 64bit RyuJIT

Method	Mean	Error	StdDev	Scaled	ScaledSD	Gen 0	Allocated
GiraffeView	4.739 us	0.0504 us	0.0447 us	3.11	0.03	1.4801	6240 B
XmlView	8.586 us	0.1155 us	0.1081 us	5.63	0.07	3.3417	14040 B
ByteView	1.525 us	0.0053 us	0.0044 us	1.00	0.00	0.2899	1224 B
ByteViewAsync	5.287 us	0.0427 us	0.0400 us	3.47	0.03	1.1673	4904 B
TemplateView	1.407 us	0.0122 us	0.0114 us	0.92	0.01	0.1469	624 B

2 - Test on filesystem to see how much IO impacts perf and if benfit material

BenchmarkDotNet=v0.10.11, OS=Windows 10 Redstone 3 [1709, Fall Creators Update] (10.0.16299.192)
Processor=Intel Core i7-4770K CPU 3.50GHz (Haswell), ProcessorCount=8
Frequency=3415989 Hz, Resolution=292.7410 ns, Timer=TSC
.NET Core SDK=2.1.4
  [Host]     : .NET Core 2.0.5 (Framework 4.6.26020.03), 64bit RyuJIT DEBUG
  DefaultJob : .NET Core 2.0.5 (Framework 4.6.26020.03), 64bit RyuJIT

Method	Mean	Error	StdDev	Scaled	ScaledSD	Gen 0	Allocated
GiraffeView	240.4 us	4.754 us	6.664 us	1.00	0.04	2.4414	10.3 KB
XmlView	256.0 us	3.271 us	3.060 us	1.07	0.03	3.9063	17.91 KB
ByteView	239.5 us	4.627 us	6.017 us	1.00	0.00	1.2207	5.39 KB
ByteViewAsync	337.9 us	5.047 us	4.214 us	1.41	0.04	4.8828	2.69 KB
TemplateView	244.2 us	4.527 us	5.031 us	1.02	0.03	0.9766	4.81 KB