Less version 487

Version 487 was released on 25 Oct 2016.

These are the differences between version 481 and version 487:

• New commands ESC-{ and ESC-} to shift to start/end of displayed lines.
• Make search highlights work correctly when changing caselessness with -i.
• New option -Da in Windows version to enable SGR mode.
• Fix "nothing to search" error when top or bottom line on screen is empty.
• Fix bug when terminal has no "cm" termcap entry.
• Fix incorrect display when entering double-width chars in search string.
• Fix bug in Unicode handling that missed some double width characters.
• Update Unicode database to 9.0.0.