Added notes for v2.6.0.

v2.5.0 HOWTO changes

Delete distribution/Sequential RTFD template.rtfd directory

the RTFd distribution method no longer works so this template file is no longer needed

Updated for 2.3.0

various bug fixes and small improvements for version 2.2.2 (2023-08-17)

Fixed truncated text on thumbnails. Fixed the disappearing cursor bug…

…. Updated to build using Xcode 14.2.

first commit