[Feature] Add twitter feed in the footer

[Nyholm]

Add a feed with tweets:

• from symfonyse
• mentions of symfonyse
• hashtag symfonyse

Look in the footer on the base template. There is some code in a comment. This is a template how the twitter feed should look like.

[Nyholm]

The API resources:
https://dev.twitter.com/docs/api/1.1/get/statuses/user_timeline
https://dev.twitter.com/docs/api/1.1/get/statuses/mentions_timeline

[rashidfawad]

I'm gonna do it.