added usage and installation info

README.md

@@ -1,2 +1,66 @@
 # ation
-– a simple keynote software for Markdown files – written in `electron`
+– a simple keynote software for markdown files – written using `electron`
+
+![ation logo](./assets/appIcon.svg)
+
+## Usage
+After opening any markdown file you can press <kbd>Tab</kbd> to show all
+available keybindings. The keybindings are chosen, so they work with commont
+presenters like the *"Logitech R400"*.
+
+### Markdown
+`ation` tries to make a presentation out of any ordinary markdown file. It
+considers `H1` titles to be a standalone slide and `H2` titles to start a new
+slide. There also is a special template for a "cover slide", which is
+provisioned by meta data at the top of your markdown file.
+
+### Meta data
+To keep compatibility with other markdown parsers, `ation` does not implement a
+`YAML` front matter or similar, but tries to parse the first `HTML` comment in
+your markdown file as meta data. The meta data is specified as simple key-value
+pairs, one pair per line, a color (`:`) seperating the key from the value.
+
+**Possible values**
+
+| Key              | Type                | Example Value                |
+| ---------------- | ------------------- | ---------------------------- |
+| title            | string              | My Keynote                   |
+| subtitle         | string              | an introduction into `ation` |
+| author           | string              | MikO, Massive Dynamic        |
+| email            | email address       | miko@mail.tld                |
+| icon             | path *(relative)*   | ./my_logo.svg                |
+| color_highlight  | CSS color value     | #4994DA                      |
+| color_background | CSS color value     | #1A1A1A                      |
+| color_text       | CSS color value     | #DDDDDD                      |
+| font             | CSS font identifier | Iosevka                      |
+
+**Example**
+```html
+<!--
+	title            : My Keynote                  
+	subtitle         : an introduction into `ation`
+	author           : MikO, Massive Dynamic       
+	email            : miko@mail.tld               
+	icon             : ./my_logo.svg               
+	color_highlight  : #4994DA                     
+	color_background : #1A1A1A                     
+	color_text       : #DDDDDD                     
+	font             : Iosevka                     
+-->
+```
+
+The color values override the ones that have been set in `ation`'s settings on a
+per slideshow basis.
+
+## Installation
+Either choose a pre-built release from the [releases page][release] or build
+`ation` yourself running
+
+```bash
+npm i
+npm run dist
+```
+
+Releases are currently only available for `macOS` and `Windows`.
+
+[release]: releases