ciaranj/node-oauth — pull request #195 by Tschuck (2014-05-07 14:36:58+00:00)
Title: Add the opportunity of proxy handling to the oauth2 module

I adjusted the oauth2 module to pass proxy settings as an optional parameter to the constructor.
If proxy settings are available, the options object for the _executeRequest method will be extended with them.
A sample proxy-object looks like this :
```
proxy : {
host : 'port',
port : 'host',
protocol : 'http' // http / https
}
```