Merge pull request #15 from chrishutchinson/fix/readmeRequirements

fix: Add requirements to README, and update some copy

README.md

@@ -6,25 +6,40 @@
 
 ![Example output of the script](capture.png)
 
+## Requirements
+
+To run this code, you will need Python 3.6+.
+
+### Raspbian
+
+If you're using Raspbian Lite, you'll also need to install:
+
+- `libopenjp2-7`
+
+with:
+
+```bash
+$ sudo apt-get install libopenjp2-7
+```
+
 ## Usage
 
 1. Clone this repo
 
-2. Install dependcies
+2. Install dependencies
 
 ```bash
 $ pip install -r requirements.txt
 ```
 
 3. Sign up for the [Transport API](https://www.transportapi.com/), and generate an app ID and API key
 
-4. Copy `config.sample.json` to `config.json` and complete the values, including your Transport API keys from step 3. Note: station names should be provided as their three-letter station code, all available [here](https://www.nationalrail.co.uk/stations_destinations/48541.aspx).
+4. Copy `config.sample.json` to `config.json` and complete the values, including your Transport API keys from step 3. _Note: station names should be provided as their three-letter station code, all available [here](https://www.nationalrail.co.uk/stations_destinations/48541.aspx)._
 
 5. Start the app with:
 
 ```bash
 $ python ./src/main.py --display pygame --width 256 --height 64
-
 ```
 
 Change the `--display` flag to alter the output mechanism (a list of options can be found in this README: https://github.com/rm-hull/luma.examples). Use `capture` to save to images, and `pygame` to run a visual emulator.
@@ -35,6 +50,10 @@ Remember to pass `--interface spi` if you are using SPI to communicate with your
 $ python ./src/main.py --display ssd1322 --width 256 --height 64 --interface spi
 ```
 
+## Video demo
+
+I've tweeted a video demo of the software running on a real device: https://twitter.com/chrishutchinson/status/1136743837244768257
+
 ## Thanks
 
 The fonts used were painstakingly put together by `DanielHartUK` and can be found on GitHub at https://github.com/DanielHartUK/Dot-Matrix-Typeface - A huge thanks for making that resource available!