Disable "Produce outputs on build" from test project; see https://github.com/dotnet/corefx/issues/4578

Update to rc1 (23516 dependencies); implement test skipping (including case-sensntivity check); swap all explicit #if to vague #if so we can iterate without bulk changes

Port tests to xUnit

There's a hit or miss on the dnx run style entry point now - but this
isn't really needed with dnx test, we can just drop the old code IMO.

This let's us run the tests much faster and all from Visual Studio,
command line, and Appveyor.

TODO: Flag missing test methods

Upgrading platform monikers

Update README URLs based on HTTP redirects

Increase extensibility of SqlBuilder.

Fixup NuGet.Config and project.json to get things to compile; core-clr: the gift that keeps on giving

Code cleanup - take 2

- Expression bodies
- Auto-properties (also get-only properties)
- Null propagation
- `nameof` operator
- String interpolation
- Dictionary initializer
- await in finally clause

Add `System.Xml` framework assembly

Without it, Resharper complains about needing the `System.Xml` module when using the `DataTable` class. Project compiles fine without it though. The .NET 4 .csproj file included it as well.

fixed GetAll when used with ExplicitKey

Merge branch 'projectlock' of https://github.com/sebastienros/dapper-dot-net into sebastienros-projectlock

Conflicts:
	Dapper.DNX.Tests/project.lock.json
	Dapper/project.lock.json

DNX improvements

Added global.json to solution items too.