Create EmbedNativeResource.cs

Task to embed resource in a DLL/EXE file.
The resource is embedded natively rather than .NET way (different PE)
Update MSBuild.Community.Tasks.csproj

Add EmbedNativeResource task
Update MSBuild.Community.Tasks.Targets

Add task EmbedNativeResource
Update MSBuild.Community.Tasks.xsd

Add documentation of EmbedNativeResource task
Merge pull request #48 from nirbar/master

Add task EmbedNativeResource - embed a native resource into a DLL/EXE file