docs: update readme with latest features

Author: JupiterPi

README.md

@@ -14,9 +14,12 @@ _**Thyme** is a stopwatch in your taskbar with history._
 
 - The **tray icon** is an activity indicator that lights up green/gray to indicate that the stopwatch is/isn't running. Click it to toggle the stopwatch. Double-click to show/hide the UI window(s).
 - Every time you stop the stopwatch, an **entry is saved to the history** including the start and end time. 
+- Save small **notes** at any time to document what you're doing.
 - The small **dashboard** shows you whether a stopwatch is running, as well as the start time and duration. 
 - The **history** page displays all entries in chronological order and grouped by day.
 - **Advanced editing:** Edit entries' start and end times, delete them, merge two entries, insert entries, insert pauses...
+- The **timeline** page displays one day's entries like a calendar.
+- Export your data in CSV format.
 
 Thyme is in development, and more features are on the way.