@gki is right, however, you can also just using Ionic CLI with command like:
$ ionic add [component name]
For example, the command $ ionic add ngCordova
will make ionic install ngCordova into the www/lib path(see .bowerrc),and then update the bower.json like using bower install ngCordova --save-dev
:
{
"name": "your_project_name",
"private": "true",
"devDependencies": {
"ionic": "driftyco/ionic-bower#1.0.0-beta.14",
"ngCordova": "~0.1.11-alpha"
}
}