Renamed test project to Solstat.Library.Tests

Renamed test project Solstat.Tests to Solstat.Library.Tests
Format files with 2 space indentation

Reformatted most files by decreasing indentation to 2 spaces
Use .NET 4.5 as target platform

Use .NET 4.5 as target platform for projects that were using 4.0 because
Roslyn needs 4.5
Added Roslyn nuget package

Added Roslyn nuget package and reference from Solstat.Library
Added test data to Solstat.Library.Tests\Data
Copy test data to output when building

Make sure test data is copied (if newer) to output when building
Solstat.Library.Tests so it is accessable when running test
Added NUnit 2.6.3 to Solstat.Library.Tests
Cleaned up test data
Changed target framework for test data

Changed target framework to 4.0 for ClassLibrary and to 4.0 Client
profile for ConsoleApplication1
Refactored tests using NUnit
Refactored FileHelper tests to NUnit as well