Editor fixes, code cleanup, bool colors, open dialog

README.md

@@ -2,6 +2,11 @@
 
 This is an editor for JSON files, that also supports YAML. 
 
+> [!WARNING]
+> This software is still very much beta. That means there will be bugs. Please
+> report them, and don't go doing stupid stuff like editing your live configuration
+> files in place.
+
 ## Features
 
 - Interactive terminal TUI application
@@ -35,7 +40,8 @@ $ mv bin/jsonedit.phar ~/bin/jsonedit
 ## Using
 
 JSONEdit is controlled using hotkeys. The essential keys are always displayed
-at the bottom of the screen.
+at the bottom of the screen. Press **h** for the help, which lists all available
+keys.
 
 ### Creating a document from scratch