1) Changes to the template program language discussed in https://www.mobileread.com/forums/showthread.php?t=337668
2) General improvement of the template documentation, including documentation of the above changes. I looked at the changes using a markdown interpreter, but there might be problems exposed by generation of the web page.
3) Focus the program text box when opening the template dialog
4) Small changes to non-built-in template functions to improve performance