Updating dev Nuget.config
Removed files from project file
Updated solution file.
- Removed OptionsModel assembly
Reacting to System.IO.FileSystem package version change
Reacting to System.IO package version change
Updated to use the new target framework in project.json
Updated to use the new target framework in project.json
Use the CallContextServiceLocator.Locator to figure out the app base
- Leave in the other logic until we figure out where this library runs
(net45, aspnetcore etc)

#109
Don't use current directory on mono, that's KRuntime specific
Make PathResolver shared code
- Added Microsoft.Framework.ConfigurationModel.Shared which has code shared
between configuration projects.