Changing "name" and "bin" property in package.json to "jiratrack"

To uninstall this node module before, you will need to use:
```
sudo npm uninstall -g log-work
```

This PR will allow us to install and uninstall the node module globally using the same name e.g.
```
sudo npm install -g jiratrack 
sudo npm uninstall -g jiratrack
```