Symbol chars used instead of single length strings
-Added Merge to LINQ to JSON
Merge pull request #338 from bbowyersmyth/chars

Symbol chars used instead of single length strings
ToCamelCase performance and memory tuning
Merge pull request #341 from bbowyersmyth/perf

ToCamelCase performance and memory tuning
-Code cleanup
-JProperty performance
-Improved property name escape skipping
-Merge demo
-Fixed WinRT build
-Build
-Fixed error in JTokenWriter when disposing after adding a duplicate property
-Fixed not validating JSON when deserializing with DataTableConverter
Merge remote-tracking branch 'upstream/master'