title: pbjs command not found after installing pbjs in project
body: <p>I am working on an ionic project using protobuf and I already installed protobuf. Bow i want to install the pbjs tool. I did so in the project directory using npm install pbjs. But when i use pbjs followed by valid arguments, I am given -bash: command not found 'pbjs'</p>
  
  <p>What am I doing wrong?</p>