(GH-14) Python Alternate Source

- Able to find pip, starting by finding python, then going to the
registry to find python install location.
- Able to install python if not found
- Able to list packages
- Able to install pacakges
- Able to upgrade packages
- Able to uninstall packages

src/chocolatey/chocolatey.csproj

@@ -111,6 +111,7 @@
     <Compile Include="infrastructure.app\services\FilesService.cs" />
     <Compile Include="infrastructure.app\services\IFilesService.cs" />
     <Compile Include="infrastructure.app\services\ISourceRunner.cs" />
+    <Compile Include="infrastructure.app\services\PythonService.cs" />
     <Compile Include="infrastructure.app\services\RubyGemsService.cs" />
     <Compile Include="infrastructure.app\services\WindowsFeatureService.cs" />
     <Compile Include="infrastructure\adapters\CustomString.cs" />

src/chocolatey/infrastructure.app/registration/ContainerBinding.cs

@@ -96,6 +96,7 @@ public void RegisterComponents(Container container)
                             new WebPiService(container.GetInstance<ICommandExecutor>(), container.GetInstance<INugetService>()),
                             new WindowsFeatureService(container.GetInstance<ICommandExecutor>(), container.GetInstance<INugetService>(), container.GetInstance<IFileSystem>()),
                             new CygwinService(container.GetInstance<ICommandExecutor>(), container.GetInstance<INugetService>(), container.GetInstance<IFileSystem>(), container.GetInstance<IRegistryService>()),
+                            new PythonService(container.GetInstance<ICommandExecutor>(), container.GetInstance<INugetService>(), container.GetInstance<IFileSystem>(), container.GetInstance<IRegistryService>()),
                             new RubyGemsService(container.GetInstance<ICommandExecutor>(), container.GetInstance<INugetService>())
                         };
                     return list.AsReadOnly();