Add base-share menu (moved from streamhub-ui).
Update facebook share url
Replace permalink option in share popover to input text
Add styling for permalink text field
Update position of popover
Check if popover is already active in share command.
Reposition arrow to be centered on positionView.
Move popover arrow repositioning to streamhub-ui/popover
Merge pull request #3 from Livefyre/refactor

Refactor