Commented Feature: Update : [statuses/mentions_timeline] Add parameters [1687]

Reference : https://dev.twitter.com/docs/api/1.1/get/statuses/mentions_timeline

Update methods :

- User.GetMentions()

Parameters to add :

- count
- since_id
- max_id
- trim_user
- contributor_details
- include_entities
Comments: Associated with changeset 36467: Version 0.9.3.0
- Distinguished HomeTimelineRequestParameter from BaseTimelineRequestParameter as it included the ExcludeReplies option that is not available for MentionsTimeline