Merge branch 'master' into add-data-structures

README.md

@@ -300,6 +300,7 @@ Work in progress drivers. Help the authors make these crates awesome!
 - [bit_field](https://crates.io/crates/bit_field): manipulating bitfields and bitarrays
 - [heapless](https://crates.io/crates/heapless): provides `Vec`, `String`, `LinearMap`, `RingBuffer` backed by fixed-size buffers
 - [managed](https://crates.io/crates/managed): provides `ManagedSlice`, `ManagedMap` backed by either their std counterparts or fixed-size buffers for `#![no_std]`.
+- [smoltcp](https://github.com/m-labs/smoltcp): a small TCP/IP stack that runs without `alloc`
 
 [no-std-category]: https://crates.io/categories/no-std
 [#2]: https://github.com/rust-embedded/awesome-embedded-rust/issues/2