Add nuget package

[bfriesen]

On install, the package:

• Adds InjectModuleInitializer.exe to the nuget package's 'tools' folder.
• Adds a AfterBuild target to the project.
  • Uses the "default" command-line arguments.
  • Not signed.
  • Default file/method name.
• Adds a ModuleInitializer class (per the default command-line args above), to the project root.
  • Includes // TODO: Add assembly initialization logic comment to indicate to the user where to put their module initialization logic.
• Displays a README, including TODO: and License sections.

On uninstall, the package:

• Removes the project's AfterBuild target.