ADD: list of supported types and their dependency, fix minor things

README.md

@@ -4,12 +4,26 @@
 Vimiv RawPrev enables support for RAW images by extracting the jpeg thumbnail embedded in RAW images.
 
 ### Installation
+* Depending on the desired format, different dependencies are required. Please see the list below.
 - This plugin is currently based on `dcraw` which needs to be installed.
 - Clone this project into `$XDG_DATA_HOME/vimiv/plugins/`
-- Activate Vimiv Importer by adding `rawprev =` to the `PLUGINS` section of `$XDG_CONFIG_HOME/vimiv/vimiv.conf`.
+- Activate Vimiv RawPrev by adding `rawprev =` to the `PLUGINS` section of `$XDG_CONFIG_HOME/vimiv/vimiv.conf`.
 
 ### Usage
 Everything is done automatically, simply enjoy viewing your RAW images.
 
+### Supported Formats
+The following RAW formats are currently supported:
+
+| **Format**  | **Extension** | ** Dependancy**                          |
+| :---        | :---:         | :---                                     |
+| Canon Raw 2 | `.cr2`        | [dcraw](https://www.dechifro.org/dcraw/) |
+| Canon Raw 3 | `.cr3`        | [exiftool](https://exiftool.org/)        |
+
+### Contribute
+If you would like support for a new RAW format feel free to open a PR with the appropriate additions. In case you do not know how this is implemented, you are also very welcome to open an issue and submit an adequate sample file.
+
+Let me also know if you detect some inconsistencies with the type detection. I.e. a non-raw file is being detected as a raw or vice-versa.
+
 ### Similar Plugins
 - The [imageformats](https://karlch.github.io/vimiv-qt/documentation/configuration/plugins.html#imageformats) enables support for RAW images too. However, it is based on [qtraw](https://gitlab.com/mardy/qtraw) which seems to be broken currently.