Added a way to add more userProfile parser to use other google API

[jbpin]

Added a new options on the Strategy called profileParser that allow a developer to add a custom profile parser to handle more user fields or use another google API such as People API (https://developers.google.com/people/api/rest/)

[coveralls]

Coverage decreased (-6.6%) to 93.388% when pulling 6eaa0cd on jbpin:master into 2b0039a on jaredhanson:master.

[coveralls]

Coverage decreased (-6.6%) to 93.388% when pulling 6eaa0cd on jbpin:master into 2b0039a on jaredhanson:master.

[coveralls]

Coverage decreased (-6.6%) to 93.388% when pulling 1a745fb on jbpin:master into 2b0039a on jaredhanson:master.

[alexeimoisseev]

This feature is really important. The current way of parsing userinfo is not flexible at all. E.g. I don't want this strategy to make user profile contain useless "value" fields in emails and in other places.

emails": [
{
"value": "user@gmail.com"
}
],

@jaredhanson please accept this pr.