Version 1.4.0
* Fixes:
* Make sure certain variables are initialized before using them.
* Fixed cursor attribute on search failure.
* Some option names contain - instead of _.
* Correction of potential dereferencing of a NULL pointer.
* Correction of compiler warnings.

* Improvements:
* Reworked code to go to start/end of line in col/line mode.
* Added a scrollbar below the window in col/line mode that displays
when necessary.
* UTF-8 space support for empty strings.
* Support for UTF-8 extended grapheme clusters if supported by the
terminal.

* Miscellaneous:
* Changed the appearance of scrollbars to make them more discreet.
* Correction of typos in comments and in the manual.
* Code simplification and redesign.
* Reformatting the code to make it more readable.
* Made more NULL comparisons explicit.