- Added a new configuration option, postOnSubBoardInsteadOfGoToNext, that affects what happens after the user reads the last message on a sub-board: If this is set to true, then the reader will prompt the user if they want to post on the sub-board, then exit (this is the stock Synchronet behavior).  If this is set to false, then the reader will prompt the user whether to go to the next sub-board after reading the last message on a sub-board.  Also, added the postOnSubBoard text configuration parameter for the theme filename, which specifies the text to use for prompting the user if they want to post on the sub-board after reading the last message.
- Added new configuration options areaChooserHdrFilenameBase and areaChooserHdrMaxLines.  These options specify the filename base for a header file to use for the message area chooser list and the maximum number of lines to use from the area chooser header file.  The filaname is without the extension - The reader will first look for an .ans version, then an .asc version.  Additionally, multiple header files can be used for different terminal widths - For example, chooserMsgHdr-80.ans for an 80-column terminal, choosrMsgHdr-140.ans for a 140-column terminal, etc.