Merge #249

249: Add more usbd crates, fix existing entries r=andre-richter a=agalakhov

Add usbd-hid-device and usbd-midi. `usbd-hid-device` is another HID implementation that tries to be safe. `usbd-midi` is simple MIDI class driver that allows the microcontroller to send MIDI events to the PC thus implementing custom MIDI controllers.

Add crates.io links to all usbd crates.

Fix trivial typo in `avr-hid`.

Co-authored-by: Alexey Galakhov <agalakhov@gmail.com>

Author: bors[bot]

README.md

@@ -241,7 +241,7 @@ Implementations of [`embedded-hal`] for microcontroller families and systems run
 ### Microchip
 
 - [`atsamd-hal`](https://crates.io/crates/atsamd-hal) - HAL for SAMD11, SAMD21, SAMD51 and SAME54 - ![crates.io](https://img.shields.io/crates/v/atsamd-hal.svg)
-- ['avr-hal'](https://github.com/Rahix/avr-hal) - HAL for AVR microcontroller family and AVR-based boards
+- [`avr-hal`](https://github.com/Rahix/avr-hal) - HAL for AVR microcontroller family and AVR-based boards
 
 ### Nordic
 
@@ -481,6 +481,8 @@ have achieved the "released" status (published on crates.io + documentation / sh
 1. [VEML6075] - I2C - UVA and UVB light sensor - [Intro blog post][27] - ![crates.io](https://img.shields.io/crates/v/veml6075.svg)
 1. [usbd-serial] - USB CDC-ACM class (serial) implementation - [github][37] - ![crates.io](https://img.shields.io/crates/v/usbd-serial.svg)
 1. [usbd-hid] - USB HID class implementation - [github][38] - ![crates.io](https://img.shields.io/crates/v/usbd-hid.svg)
+1. [usbd-hid-device] - USB HID class implementation without `unsafe` - [github][40] - ![crates.io](https://img.shields.io/crates/v/usbd-hid-device.svg)
+1. [usbd-midi] - USB MIDI class implementation - [github][41] - ![crates.io](https://img.shields.io/crates/v/usbd-midi.svg)
 1. [usbd-webusb] - USB webUSB class implementation - [github][39] - ![crates.io](https://img.shields.io/crates/v/usbd-webusb.svg)
 
 [1&2]: http://blog.japaric.io/wd-1-2-l3gd20-lsm303dlhc-madgwick/
@@ -520,6 +522,8 @@ have achieved the "released" status (published on crates.io + documentation / sh
 [37]: https://github.com/mvirkkunen/usbd-serial
 [38]: https://github.com/twitchyliquid64/usbd-hid
 [39]: https://github.com/redpfire/usbd-webusb
+[40]: https://github.com/agalakhov/usbd-hid-device
+[41]: https://github.com/btrepp/usbd-midi
 
 [AD983x]: https://crates.io/crates/ad983x
 [adafruit-alphanum4]: https://crates.io/crates/adafruit-alphanum4
@@ -557,6 +561,11 @@ have achieved the "released" status (published on crates.io + documentation / sh
 [TSL256X]: https://crates.io/crates/tsl256x
 [VEML6030/VEML7700]: https://crates.io/crates/veml6030
 [VEML6075]: https://crates.io/crates/veml6075
+[usbd-serial]: http://crates.io/crates/usbd-serial
+[usbd-hid]: http://crates.io/crates/usbd-hid
+[usbd-hid-device]: http://crates.io/crates/usbd-hid-device
+[usbd-midi]: http://crates.io/crates/usbd-midi
+[usbd-webusb]: http://crates.io/crates/usbd-webusb
 
 *NOTE* You may be able to find even more driver crates by searching for the [`embedded-hal-driver`]
 keyword on crates.io!