Error in run.sh for running CQ-editor

[MatthewTromp]

In doc/installation.rst, under the CQ-editor installation instructions, it says

To run from command.:

$HOME/cq-editor/run.sh

However if you try and run this command while not already inside the cq-editor directory, it fails.

birdpet@earth:~$ $HOME/cq-editor/run.sh

/home/birdpet/cq-editor/run.sh: 2: exec: bin/cq-editor: not found

run.sh runs exec bin/cq-editor, which is relative to the user's current directory, rather than the directory of the script. Either the documentation should be changed to tell users to first cd into the directory, or the contents of run.sh should be changed to something like the following:

#!/bin/bash
parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )

cd "$parent_path"
exec bin/cq-editor