#1733: add readme for use in nuget readme documentation

[schambers]

Adds a readme doc that will strictly be used on the nuget project page located here https://www.nuget.org/packages/FluentMigrator

Fixes #1733

[schambers]

For your review @jzabroski

[jzabroski]

Shouldn't the Readme xml tag say - nuget in the filename? Have not closely read how this works.

[schambers]

@jzabroski you should need to specify where the readme file is located at. I don't believe it needs to be named anything special.

[jzabroski]

I think we might need to upgrade nuget on the ci build to a newer version from 5.4?

Attempting to build package from 'FluentMigrator.Console.nuspec'.
The element 'files' in namespace 'http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd' has invalid child element 'readme' in namespace 'http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd'. List of possible elements expected: 'file' in namespace 'http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd'. This validation error occurred in a 'readme' element.

[jzabroski]

https://github.com/NuGet/NuGet.Client/blob/dev/src%2FNuGet.Core%2FNuGet.Packaging%2Fcompiler%2Fresources%2Fnuspec.xsd

[jzabroski]

It looks like it needs to say:

                <readme>docs\README-nuget.md</readme>
	</metadata>
	<files>
		<file src="_._" target="content"/>
		<file src="tools/" />
		<file src="docs/README-nuget.md" target="docs" />
	</files>
</package>

Not done investigating.

[jzabroski]

Resolved last night.