command not found? 

Hello, 

I've just stumbled upon this client again and wanted to use it once more. 
I can get it to work however. Can anyone help me? 

```
jan@Everest:~$ npm -g install node-pushover-client
+ node-pushover-client@2.1.0
updated 1 package in 0.771s
jan@Everest:~$ 
jan@Everest:~$ pushover
-bash: pushover: command not found
``` 

Thank You & best regards, 
Jan 