Add simple installation script

README.md

@@ -4,6 +4,12 @@ Simple plain-text time tracking.
 
 The Python script `tx` provides short-hands for accessing and reading a `time.txt` file, as described below.
 
+## Installation
+
+For testing, you can just run `tx` in this directory using `./tx`.
+
+If you want to be able to use it anywhere, run `install.sh`. The `tx` command should then be available in any folder.
+
 ## Usage
 
 Create a new `time.txt` file at the current location: `tx create`

install.sh

@@ -0,0 +1 @@
+sudo ln -s $(pwd)/tx /usr/local/bin/tx