Add some additional cargo metadata

Author: mvertescher

Cargo.toml

@@ -2,11 +2,13 @@
 authors = ["Matt Vertescher <mvertescher@gmail.com>"]
 categories = ["embedded", "hardware-support", "no-std"]
 description = "HAL for the STM32F7xx family of microcontrollers"
+documentation = "https://docs.rs/stm32f7xx-hal"
 edition = "2018"
 keywords = ["arm", "cortex-m", "stm32f7xx", "hal"]
 license = "MIT OR Apache-2.0"
 name = "stm32f7xx-hal"
-repository = "https://github.com/mvertescher/stm32f7xx-hal"
+readme = "README.md"
+repository = "https://github.com/stm32-rs/stm32f7xx-hal"
 version = "0.1.0"
 
 [package.metadata.docs.rs]