I created the Help project to generate the API documentation for the project.

I created the Help project using the Sandcastle Help File Builder Visual
Studio package. The Help project will generate the HTML API
documentation that will be hosted on the GitHub Pages website for the
project. I updated the README.md document to indicate that Visual Studio
2012 and the Sandcastle Help File Builder are required to build the
project.
I created the MSBuildExtensions.targets file.

I created the MSBuildExtensions.targets file to allow consumers of the
MSBuild Extensions NuGet package to import the single .targets file to
get all of the custom MSBuild tasks imported into their build project. I
updated the MSBuildExtensions.nuspec manifest to include the .targets
file in the tools output directory of the NuGet package.
I updated the HTML help documentation.

I added remarks and an example for the GenerateVersionInfo MSBuild task.
I revised the settings for the generated HTML help documentation.
Merge branch 'release/1.0'