v0.1.2.12:
- update doc/CHANGELOG
- replace names of file type indicators
- make preparations for key 'o' to sort files (atime, ctime, mtime, basename, type, size)
  - change __blscd_p_build_array_ini(), __blscd_p_build_array_mark_update() and __blscd_p_build_array_update()
  - change __blscd_p_build_array_time()
v0.1.2.13: correct simple commands
v0.1.2.14: revise __blscd_p_build_array_mark_update()
v0.1.2.15: use stat instead find and sort because of performance
v0.1.2.15: use stat instead find and sort because of performance
create __blscd_main()
v0.1.2.16
v0.1.2.17: remove highlighting and marking of search results
v0.1.2.18: revise __blscd_p_draw_screen_lines()
v0.1.2.19: revise marking
v0.1.2.20: modify printf in __blscd_f_draw_screen(); needs revision in the future
v0.1.2.30: implement sorting methods with key o
v0.1.2.31: format __blscd_f_help()
v0.1.2.31: implement sorting methods with key o
v0.1.2.31: implement sorting methods with key o
v0.1.3.0:
- implement sorting (atime, ctime, mtime, size, basename, natural) with keys <oX>
- hide/unhide files; toggle filter with key <^H>
- temporarily remove marking/selection action
- restructuring functions