Vendor dependencies for 0.3.0 release

vendor/windows-targets/readme.md

@@ -0,0 +1,28 @@
+## Import libs for Windows
+
+The [windows-targets](https://crates.io/crates/windows-targets) crate includes import libs, supports semantic versioning, and optional support for raw-dylib. 
+
+* [Getting started](https://kennykerr.ca/rust-getting-started/)
+* [Samples](https://github.com/microsoft/windows-rs/tree/0.58.0/crates/samples)
+* [Releases](https://github.com/microsoft/windows-rs/releases)
+
+Start by adding the following to your Cargo.toml file:
+
+```toml
+[dependencies.windows-targets]
+version = "0.52"
+```
+
+Use the `link` macro to define the external functions you wish to call:
+
+```rust,no_run
+windows_targets::link!("kernel32.dll" "system" fn SetLastError(code: u32));
+windows_targets::link!("kernel32.dll" "system" fn GetLastError() -> u32);
+
+fn main() {
+    unsafe {
+        SetLastError(1234);
+        assert_eq!(GetLastError(), 1234);
+    }
+}
+```