Update README.md

Adds links, updates incorrect styling and improves the text a little bit.

README.md

@@ -1,6 +1,5 @@
 # Spoolman to Superslicer filament transfer
-
-Spoolman to SuperSlicer filament transfer
+Create [SuperSlicer](https://github.com/supermerill/SuperSlicer) filament configuration from the filaments in [Spoolman](https://github.com/Donkie/Spoolman).
 
 ## Prepare for running
 
@@ -12,7 +11,7 @@ pip install -r requirements.txt
 ```
 
 ## Config file templates
-spoolman2superslicer uses Jinja2 templates for the configuration files
+spoolman2superslicer uses [Jinja2](https://palletsprojects.com/p/jinja/) templates for the configuration files
 it creates. They are stored with the filaments' material's name in
 `templates/`. If the material's template isn't found,
 `default.template` is used.
@@ -26,5 +25,5 @@ it creates. They are stored with the filaments' material's name in
 If `-D` is given, all ini files are removed in the directory before
 the new ones are created.
 
-'-U' will cause the program to keep running, adding, updating and
+`-U` will cause the program to keep running, adding, updating and
 deleting files when the filaments are changed in Spoolman.