Miscellaneous doc updates (#1383)

* Add additional links to embedding and tutorial documentation.

* Fix a broken link to CONTRIBUTING.md.

Fixes #1280.

README.md

@@ -64,7 +64,7 @@ Hello, world!
 
 * **Lightweight**. Wasmtime is a standalone runtime for WebAssembly that scales
   with your needs. It fits on tiny chips as well as makes use of huge servers.
-  Wasmtime can be embedded into almost any application too.
+  Wasmtime can be [embedded] into almost any application too.
 
 * **Fast**. Wasmtime is built on the optimizing [Cranelift] code generator to
   quickly generate high-quality machine code at runtime.
@@ -84,6 +84,7 @@ Hello, world!
   standards process all along the way too.
 
 [Cranelift]: https://github.com/bytecodealliance/wasmtime/blob/master/cranelift/README.md
+[embedded]: https://bytecodealliance.github.io/wasmtime/embed.html
 
 ## Documentation
 

cranelift/README.md

@@ -60,8 +60,10 @@ Contributing
 ------------
 
 If you're interested in contributing to Cranelift: thank you! We have a
-[contributing guide](CONTRIBUTING.md) which will help you getting involved in
+[contributing guide] which will help you getting involved in the Cranelift
-the Cranelift project.
+project.
+
+[contributing guide](https://bytecodealliance.github.io/wasmtime/contributing.html)
 
 Planned uses
 ------------

crates/jit/README.md

@@ -2,5 +2,9 @@ This is the `wasmtime-jit` crate, which contains JIT-based execution
 for wasm, using the wasm ABI defined by [`wasmtime-environ`] and the
 runtime support provided by [`wasmtime-runtime`].
 
+Most users will want to use the main [`wasmtime`] crate instead of using this
+crate directly.
+
 [`wasmtime-environ`]: https://crates.io/crates/wasmtime-environ
 [`wasmtime-runtime`]: https://crates.io/crates/wasmtime-runtime
+[`wasmtime`]: https://crates.io/crates/wasmtime

crates/runtime/README.md

@@ -5,6 +5,10 @@ support, supporting the wasm ABI used by [`wasmtime-environ`],
 This crate does not make a host vs. target distinction; it is meant to be
 compiled for the target.
 
+Most users will want to use the main [`wasmtime`] crate instead of using this
+crate directly.
+
 [`wasmtime-environ`]: https://crates.io/crates/wasmtime-environ
 [`wasmtime-jit`]: https://crates.io/crates/wasmtime-jit
 [`wasmtime-obj`]: https://crates.io/crates/wasmtime-obj
+[`wasmtime`]: https://crates.io/crates/wasmtime

docs/embed-rust.md

@@ -7,7 +7,7 @@ crate][wasmtime] has to offer and the [book examples for
 Rust](./examples-rust-embed.md) for more information.
 
 [apidoc]: https://bytecodealliance.github.io/wasmtime/api/wasmtime/
-[wasmtime]: https://crates.io/crates/wasmtime
+[crate]: https://crates.io/crates/wasmtime
 
 ## Creating the WebAssembly to execute
 

docs/embed.md

@@ -1,3 +1,10 @@
 # Embedding Wasmtime
 
-... more coming soon
+Wasmtime can be used as a library to embed WebAssembly execution support
+within applications. It has a Rust API, and also supports the official
+[WebAssembly C API].
+
+* [Rust](embed-rust.md)
+* [C](embed-c.md)
+
+[WebAssembly C API]: https://github.com/WebAssembly/wasm-c-api

docs/tutorial.md

@@ -1,3 +1,7 @@
 # Tutorial
 
-... more coming soon
+This tutorial walks through creating a simple Hello World WebAssembly program
+and then running it.
+
+* [Creating `hello-world.wasm`](tutorial-create-hello-world.md)
+* [Running `hello-world.wasm`](tutorial-run-hello-world.md)