update readme

Author: falk-werner

README.md

@@ -1,14 +1,75 @@
 # note.py
 
-Yet another note taking app.
+[note.py](https://github.com/falk-werner/note.py) is yet another note taking app. It is aimed to be minimalistic and is shipped as a single python file.
+
+## Features
+
+`note.py` has two operation modes:
+
+- **View mode*** to view existing notes
+- **Edit mode** to edit new or alter existing notes
+
+You can switch between the to modes using tabs.
+
+### View Mode
 
 ![UI view](doc/ui_view.png)
 
+In `View mode` you can browse, filter and view existing notes.
+
+### Edit Mode
+
 ![UI edit](doc/ui_edit.png)
 
+In `Edit mode` you can create new notes or edit existing ones.
+
+### Full Feature List
+
+- create notes using markdown
+- filter existing notes
+- rename exsiting notes
+- insert screenshots
+- remove existing notes
+- customize view using CSS
+
+## Accelerators
+
+There are some key bindings to speed up some tasks:
+
+| Key Binding | Description |
+| ----------- | ----------- |
+| Ctrl + n    | Create a new note |
+| Ctrl + s    | Sync changes _(note that changes are also saved automatically)_|
+| Ctrl + p    | Create screenshot |
+| Ctrl + q    | Qiut |
+
+## Customize View
+
+You can customize the vie using CSS. Therefore, just edit the file `$HOME/.notepy/style.css` as desired. To return to defaults, simply delete this file as `note.py` will re-create it during the next start.
+
+## Under the hood
+
+All notes manages by `note.py` are stored in the directory `$HOME/.notepy/notes`. There is a directory for each note according to the notes name. Each note has a file `note.md` containing the contents of the notes. Screenshots are also stored in the note directory.
+
+## Requirements
+
+`note.py` runs on Python 3.
+
+In order to run `note.py`, the following python modules should be installed:
+
+- tkinter
+- tkinter-tooltip
+- tkinterweb
+- Pillow
+- Markdown
+
+You can installe these modules using the [requiremnts.txt](requirements.txt) file provided in this repository.
+
+    pip install -r requirements.txt
 
+In oder to create screenshots, [gnome-screenshot](https://linux.die.net/man/1/gnome-screenshot) has the be installed on the system.
 
-## 3rd Party
+## Other 3rd party stuff
 
 - Icons are used from [https://icofont.com/](https://icofont.com/)  
   _(see [license agreement](https://icofont.com/license))_