About Yeoman and generator angular
Yeoman is a nodeJS-based commandline tool for quickly scaffolding out webapps. We use its angularJS generator, generator-angular, to build, test and optimise axisJS. You don't need yo or generator-angular installed to use, build or test axisJS, however, they're both very useful to have if you plan to contribute new directives, services or tests to axisJS.
Additionally, bower is used for client-side package management (the entire axisJS project can be added as a dependency via bower install axisjs --save), and grunt is used as the task runner.
While there are a multitude of ways to install nodeJS, the easiest is via the packages on nodejs.org.
Another good method on OS X is via Homebrew.
Once you have node and npm installed, continue to the next part.
At the CLI, type the following:
$ npm install -g yo generator-angular bower grunt-cli karma
If you get permissions errors, try adding sudo to the beginning of the above.