I got errors like “retry Request to https://bower.herokuapp.com/packages/angular failed with ECONNRESET, retrying in 1.1s”.

Basically you need to edit .bowerrc to include these properties:

"proxy":"http://host:port",
"https-proxy":"http://host:port",
"strict-ssl": false

Thanks original post at http://stackoverflow.com/questions/22915961/bower-install-failed-with-etimedout