Update readme to be better

README.md

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-# Model Downloader
+# Model Downloader
+A PC Beat Saber mod that allows you to download Sabers, Notes, Platforms, and Avatars directly from ModelSaber, all from a convenient window within your game.
+
+![image](https://user-images.githubusercontent.com/34404266/119272344-4b812c80-bbba-11eb-8095-01fc353bb341.png)
+
+**Features:**
+- Filtering by model type (all models/sabers/notes/platforms/avatars)
+- Sorting (newest/oldest/name/author) and searching
+- Previews for sabers and notes to preview them before downloading
+- Automatic model previews are supported, but need to be enabled in Mod Settings
+- A page with the modeler's other models that can be accessed by clicking their name on the preview
+- Warnings for downloading a model that you don't have the mod installed for
+- Automatic model detection that grays out models you already have installed
+
+## Installation and usage
+This mod requires SiraUtil and BSML, both of which can be installed easily with [Mod Assistant](https://github.com/Assistant/ModAssistant).
+
+You can install this mod by extracting the ZIP directly into your Beat Saber folder. If you're not sure where your Beat Saber folder is, it's explained on the [BSMG wiki here](https://bsmg.wiki/pc-modding.html#default-location).