rename event classes
prep work to fetch and display newsfeed
render create/watch/fork/follow event text
add endless scrolling
add GistEvent
add 'toString' for GollumEvent
add toString method for IssueCommentEvent
add 'toString' method for IssuesEvent and MemberEvent
add 'toString' methods for Public and PullRequest events
update event icons
add 'toString' methods for Push and PullRequestReview events
add toString method for Delete event
minor UI updates
minor UI updates