Create README.md file

Author: n-eq

README.md

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+# PC8544
+
+This Rust library provides [embedded-hal](https://github.com/rust-embedded/embedded-hal) support for PCD8544-based LCD displays,
+commonly used in Nokia 5110 and similar devices. \
+_It is based on [the work](https://github.com/dancek/pcd8544-hal/) by Hannu Hartikainen._
+
+## Features
+
+- [x] 100% safe
+- [x] SPI support
+- [x] GPIO support
+- [ ] Vertical scrolling (up/down)
+- [ ] Special characters support (line feed, carriage return)
+
+## Model support
+
+Any microcontroller HAL with embedded-hal support should work with this driver
+
+## Usage
+Add this line to your `Cargo.toml`'s `[dependencies]` section:
+```toml
+[dependencies]
+pcd8544 = "0.1.0"
+```
+
+An example of using the library with an Arduino Uno is provided under [examples/arduino-uno-pcd8544](examples/arduino-uno-pcd8544).
+