Merge pull request #4 from laurafeier/LUN-1507

Lun 1507
add analytics for FB, TWTTR, email
don't include socialTracking JS multiple times
merge with master
Merge pull request #5 from laurafeier/LUN-1496

add analytics for FB, TWTTR, email
Merge branch 'master' into LUN-1507
LUN-1507 : Fix checkboxes and scroller