* implement "Support custom colours" from (#174)
# imported collections module for named tuple
# add "colormap" from googler project
# add named tuple for id and title, url, desc, tag
# adjusted print_single_rec so colors can be changed for each item
# add valid color string checker from googler
# adjusted man options
# add autocompletions
* Hotfix - implement "Support custom colours" from (#174)
# sorted import in alphabetical order
# adjusted var name's
# add colors table to man file
# add color os ENV option
# add --color documentation in README under "Usage"
* fix typo error in man page color section
* Update buku-completion.bash
--color reordered in alphabetical order
* Update buku.fish
--color reordered in alphabetical order
* Update _buku
--color reordered in alphabetical order
* Hotfix2 - implement "Support custom colours" - restructure feature
# separated id from ID_str and ID_DB_STR so it can have separate color
# add 5 string color for (id, title, url, desc, tag)
# adjusted print_single_rec for 5 colors result
# fixed syntax .BI \--colors " COLORS" in man page
# replaced four with five letter string for color
# fixed default colors to "GKlxe" and "\x1b[2m" for DB index
# add example to README and man page
# removed check for colorstr_env set by user for the moment
* Fixed reviews
* Review fixes
