update readme

README.md

@@ -3,19 +3,16 @@
 It supports simple grid definitions and advanced layout definitions from a json layout definition file.
 
 ## Installation
-
-### Install git, ffmpeg and python3 with pip on your system  
-For Debian: 
+Install git, ffmpeg and python3 with pip on your system  
+Debian: 
 ```
 sudo apt install git ffmpeg python3 python3-pip
 ```
-
-### Clone this git repository
+Clone this git repository
 ```
 git clone https://git.notice.at/redplanet/video-shredder.git
 ```
-
-### Enter directory and install python requirements
+Enter directory and install python requirements
 ```
 pip3 install -r requirements.txt
 ```