added JSON.NET 5.0 Release 8
application context and fixes

- ADD: ProcessBits property to TMApplication
- FIX: minor fixes
data/content, WPF and fixes

- ADD: attachted property HTML for WebBrowser controls
- ADD: document framework
- ADD: Encoding propety to IContentProvider interface
- FIX: added missing WPF classes for other target frameworks
- FIX: removed obsolete external references to JSON.NET