Add todo.txt addons

.todo.actions.d/graph/README.md

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+# todo.txt-graph
+
+*A visualization-plugin for [todo.txt](http://todotxt.com/) – a command line todo application.*  
+
+![Graph Image](https://cloud.githubusercontent.com/assets/1055819/11110492/dd8527fe-88fc-11e5-9957-2e03db505fbd.png)
+
+**todo.txt-graph** displays bar charts showing the number of completed tasks per day.  
+
+As in Jerry Seinfeld’s [don’t break the chain](http://dontbreakthechain.com/what) technique, active days will be colored green and therefore motivate you do be more productive.
+
+## Installation
+
+`cd` into your plugins folder (see [Installing Addons](https://github.com/ginatrapani/todo.txt-cli/wiki/Creating-and-Installing-Add-ons)), e.g.:
+
+```
+cd ~/.todo.actions.d
+```
+
+Then clone this repository into the folder *graph*:
+
+```
+git clone https://github.com/timpulver/todo.txt-graph.git graph
+```
+
+The directory structure should look like this now:  
+
+```
+~/.todo.actions.d/
+    graph/
+        graph
+        graph.py  
+```
+
+## Usage
+
+Visualize last 7 days:  
+
+```
+todo.sh graph
+```
+
+Visualize last 123 days:  
+
+```
+todo.sh graph 123
+```
+
+## Threshold
+
+By default, days with less than 5 completed tasks will be considered inactive (and therefore colored grey). You can change the threshold by adding an entry to your config file (`~/.todo/config`):  
+
+```
+# Threshold for Graph Addon
+export TODOTXT_GRAPH_THRESHOLD=10
+```
+
+In the todo.txt wiki you can find further information on the config file: [config troubleshooting](https://github.com/todotxt/todo.txt-cli/wiki/Troubleshooting)
+
+## Compatibility
+
+Tested with *todo.txt* 2.11.0 on macOS 10.14.2
+
+## Contributors
+
+- [Bassmann](https://github.com/Bassmann)
+- [timpulver](https://github.com/timpulver)
+- [ninjapanzer](https://github.com/ninjapanzer)
+- [gabrielsimoes](https://github.com/gabrielsimoes)
+- [nareike](https://github.com/nareike)
+- [jucor](https://github.com/jucor)
+- [andycyca](https://github.com/andycyca)
+
+Code used from:  
+
+- [termgraph](https://github.com/mkaz/termgraph/blob/master/termgraph.py)
+- [lately](https://github.com/emilerl/emilerl/)