Add ESC-F command to keep reading data until a pattern is found.
Use exit code of LESSOPEN script if LESSOPEN starts with "||".
When up/down arrow is used on the command line immediately after typing text, the next command starting with that text is found.
Add support for GNU regex.
Add configure option --with-regex=none and fix compile errors when compiling with no regex library.
Fix bugs handling SGR sequences in Win32.
Fix possible crashes caused by malformed LESSOPEN or LESSCLOSE variables.
Fix bug highlighting text which is discontiguous in the file due to backspace processing.
Fix bug in displaying status column when scrolling backwards with -J and -S in effect.