Moved Section Into Dedicated Files

Documentation/Usage.md

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+## Run
+
+1. Download the binary.
+
+**Linux**
+
+``` shell
+wget https://github.com/tanrax/RSSingle/releases/download/v1.0.0/rssingle
+```
+
+**MacOS and Windows**
+
+Coming soon
+
+2. Gives execution permissions.
+
+``` shell
+chmod +x rssingle
+```
+
+3. In the same directory as the binary, you can create a local `config.yml` file in this format:
+
+``` yaml
+title: My RSS Feed
+description: My customised RSS feed with technology news
+url: https://www.example.com
+output: rss.xml
+feeds:
+  - https://programadorwebvalencia.com/feed/
+  - https://republicaweb.es/feed/
+```
+
+If not, you can download the example in the repository.
+
+``` shell
+curl -o config.yml https://raw.githubusercontent.com/tanrax/RSSingle/master/config.yml
+```
+
+4. Run the binary.
+
+``` shell
+./rssingle 
+```
+
+A file called `rss.xml` will be created.