Add bounded-registers alongside register-rs with brief explanation

Author: jonlamb-gh

README.md

@@ -696,7 +696,8 @@ Work in progress drivers. Help the authors make these crates awesome!
 - [`panic-persist`]: A panic handler crate inspired by `panic-ramdump` that logs panic messages to a region of RAM defined by the user, allowing for discovery of panic messages post-mortem using normal program control flow. - ![crates.io](https://img.shields.io/crates/v/panic-persist.svg)
 - [pc-keyboard]: A PS/2 keyboard protocol driver. Transport (bit-banging or SPI) agnostic, but can convert Set 2 Scancodes into Unicode. ![crates.io](https://img.shields.io/crates/v/pc-keyboard.svg)
 - [qei](https://crates.io/crates/qei) : A qei wrapper that allows you to extend your qei timers from a 16 bit integer to a 64 bit integer. - ![crates.io](https://img.shields.io/crates/v/qei.svg)
-- [register-rs](https://github.com/rust-osdev/register-rs): Unified interface for MMIO and CPU registers. Provides type-safe bitfield manipulation. - ![crates.io](https://img.shields.io/crates/v/register.svg)
+- [register-rs](https://github.com/rust-osdev/register-rs): Unified interface for MMIO and CPU registers. Provides type-safe bitfield manipulation. `register-rs` is basically Tock registers with added support for CPU register definitions using the same API as for the MMIO ones. So for bigger projects you then have homogeneous interfaces to registers of all kinds. - ![crates.io](https://img.shields.io/crates/v/register.svg)
+- [bounded-registers](https://crates.io/crates/bounded-registers) A high-assurance memory-mapped register code generation and interaction library. `bounded-registers` provides a Tock-like API for MMIO registers with the addition of type-based bounds checking. - ![crates.io](https://img.shields.io/crates/v/bounded-registers.svg)
 - [scroll](https://crates.io/crates/scroll): extensible and endian-aware Read/Write traits for generic containers - ![crates.io](https://img.shields.io/crates/v/scroll.svg)
 - [smoltcp](https://github.com/m-labs/smoltcp): a small TCP/IP stack that runs without `alloc`. ![crates.io](https://img.shields.io/crates/v/smoltcp.svg)
 - [vga-framebuffer]: A VGA signal generator and font renderer for VGA-less microcontrollers. Used by [Monotron](https://github.com/thejpster/monotron) to generate 48 by 36 character display using 3 SPI peripherals and a timer. ![crates.io](https://img.shields.io/crates/v/vga-framebuffer.svg)