Moved two tools from productivity to todo managers.

README.md

@@ -23,7 +23,7 @@ To date, **458** apps/tools covered, divided in **33** categories.
 
 # Index
 
-[Backup](#backup) (8) | [Chat and instant messaging](#chat) (8) | [Conversion](#conversion) (4) | [Data management](#data-management) (17) | [Data transfer](#transfer) (22) | [Editors](#editors) (16) | [Email](#email) (8) | [File and file system handling](#file-handling) (46) | [File manager](#file-manager) (9) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (12) | [Games](#games) (18) | [Graphics](#graphics) (12) | [Networking](#networking) (9) | [Office tools](#office) (13) | [Organizers and calendars](#organizers) (12) | [Productivity](#productivity) (19) | [Programming](#programming) (12) | [Security and encryption](#security) (16) | [Shells](#shells) (3) | [Sound and music](#music) (14) | [System monitoring](#monitor) (24) | [System tools](#system) (9) | [Terminals](#terminal) (8) | [Text processing](#text-processing) (30) | [Text search](#text-search) (8) | [Todo managers](#todo-manager) (9) | [Utilities](#utility) (32) | [Versioning](#versioning) (18) | [Viewers](#viewers) (17) | [Web browser](#browser) (9) | [Web development](#webdev) (11)
+[Backup](#backup) (8) | [Chat and instant messaging](#chat) (8) | [Conversion](#conversion) (4) | [Data management](#data-management) (17) | [Data transfer](#transfer) (22) | [Editors](#editors) (16) | [Email](#email) (8) | [File and file system handling](#file-handling) (46) | [File manager](#file-manager) (9) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (12) | [Games](#games) (18) | [Graphics](#graphics) (12) | [Networking](#networking) (9) | [Office tools](#office) (13) | [Organizers and calendars](#organizers) (12) | [Productivity](#productivity) (17) | [Programming](#programming) (12) | [Security and encryption](#security) (16) | [Shells](#shells) (3) | [Sound and music](#music) (14) | [System monitoring](#monitor) (24) | [System tools](#system) (9) | [Terminals](#terminal) (8) | [Text processing](#text-processing) (30) | [Text search](#text-search) (8) | [Todo managers](#todo-manager) (11) | [Utilities](#utility) (32) | [Versioning](#versioning) (18) | [Viewers](#viewers) (17) | [Web browser](#browser) (9) | [Web development](#webdev) (11)
 
 Some links to [related resources](#resources).
 
@@ -313,8 +313,6 @@ Some links to [related resources](#resources).
 * [posce](https://github.com/posce/posce) - A note-taking toolkit for your command line.
 * [Qalculate](https://qalculate.github.io/) - Multi-purpose calculator with customizable functions, units, arbitrary precision, plotting (it includes a GUI).
 * [Standard Unix Notes](https://github.com/Standard-Unix-Notes/unix-notes) - GPG Encrypted Notes/Notebook manager for BSD/Linux.
-* [taskbook](https://github.com/klaussinani/taskbook) - Tasks, boards & notes for the command-line habitat.
-* [taskell](https://github.com/smallhadroncollider/taskell) - Interactive kanban board/task manager.
 * [Translate Shell](https://www.soimort.org/translate-shell/) - Command-line translator using Google Translate, Bing Translator, Yandex.Translate, etc.
 * [tuxi](https://github.com/Bugswriter/tuxi) - A CLI tool that scrapes Google search results and SERPs that provides instant and concise answers.
 * [Watson](https://github.com/TailorDev/Watson) - Time tracking CLI to know how much time you are spending on your projects. It can generate nice reports for clients.
@@ -475,6 +473,8 @@ Some links to [related resources](#resources).
 * [dstask](https://github.com/naggie/dstask) - Single binary terminal-based TODO manager with git-based sync + markdown notes per task.
 * [grit](https://github.com/climech/grit) - A multitree-based personal task manager.
 * [iKog](https://sites.google.com/site/henspace/ikog/) - A fully-featured task manager incapsulated within a Python script (just carry around the script to retain all the TODOs). When the script is run, a Python shell is opened, where task-related commands can be entered (ADD, LIST, etc.); a pity that commands are uppercase, which requires the annoying use of the Shift key.
+* [taskbook](https://github.com/klaussinani/taskbook) - Tasks, boards & notes for the command-line habitat.
+* [taskell](https://github.com/smallhadroncollider/taskell) - Interactive kanban board/task manager.
 * [TaskWarrior](https://taskwarrior.org/) - Todo manager with advanced features; dedicated synchronization server available; many plugins and related tools; healthy software project.  
 * [todo.txt](http://todotxt.org/) - Minimalistic todo manager that uses a simple plain text file to keep track of items; implemented as a shell script.  
 * [todolist](http://todolist.site/) - A minimal clone of [Wunderlist](https://www.wunderlist.com/), with 30% of its features. GTD oriented. It stores the task list in a hidden JSON file in the home directory, making it easy to backup or share them.

data/apps.csv

@@ -453,7 +453,7 @@ backup,shallow-backup,https://github.com/alichtman/shallow-backup,Git integrated
 office,mdp,https://github.com/visit1985/mdp,A command-line based markdown presentation tool.
 office,sent,https://tools.suckless.org/sent/,Simple plaintext presentation tool.
 productivity,eureka,https://github.com/simeg/eureka,Store your ideas without leaving the terminal.
-productivity,taskell,https://github.com/smallhadroncollider/taskell,Interactive kanban board/task manager.
-productivity,taskbook,https://github.com/klaussinani/taskbook,"Tasks, boards & notes for the command-line habitat."
+todo-manager,taskell,https://github.com/smallhadroncollider/taskell,Interactive kanban board/task manager.
+todo-manager,taskbook,https://github.com/klaussinani/taskbook,"Tasks, boards & notes for the command-line habitat."
 office,papis,http://github.com/alejandrogallo/papis,Extensible document and bibliography manager.
 chat,tuir.,https://gitlab.com/ajak/tuir,Reddit TUI