Update README.txt

Created the README.txt that will be packaged with the next release

packaging/README.txt

@@ -1 +1,14 @@
-Placeholder file for the README.txt file that will be included in all releases
+Kura5 Savehelper version 0.1-dummy-alpha
+
+This version is only for testing purposes. It does not
+hold any code able to interact with save files. Feel free
+to abuse the code as much as you want. If you encounter
+any issues, please report them on the GitHub page.
+
+https://github.com/EarthlySkies/kura5-savehelper
+
+Installation:
+1. Extract the contents to your Kura5 game directory
+2. Move the "savehelper.py" out of the "savehelper.d" directory
+3. Launch the helper from your file explorer or terminal
+4. The program is now running and will ask you what you want to do