Merge pull request #54 from remcomulder/master

Updates from NCrunch integration
Added Assert.ThrowsAny methods. Closes #25
Added precision overloads to Assert.NotEqual. Closes #20
Added Assert.StrictEqual and Assert.NotStrictEqual overloads. Closes #30
Added Assert.StartsWith and Assert.EndsWith overloads. Part of #32
added nuget config to include additional package source
Added *nix support to AssemblyExtensions::GetLocalCodeBase
Move interfaces from xunit.execution to xunit.core (closes #59)
Improve theory parameter display (closes #28)
Add caching for creating of all static extensibility points.
Remove infinite loop potential from ArgumentFormatter.Format.
Add special handling for Type in ArgumentFormatter.Format
Move ReflectorTests into test.xunit.execution
Some tests depend on the culture for their success (fixes #41).
Move internal classes to public (fixes #51)
Update to Profile259 (.NET 45 + Win8 + WP8 + WPA8.1)
Use argument conversion for ReflectionAttributeInfo.Instantiate (fixes #62)
More performance/memory improvements and protections in ArgumentFormatter
Missed a path for the Profile259 update.
Add maximum member count to properties/fields in ArgumentFormatter.Format.