use new social icons for footer, case #13
update "Acknowledgement" page for new social icons set, case #13
update Cucumber tests for new social icons' styling, case #13
delete old social icon files, case #13
use a smaller border-radius when hovering footer's social icons, case #13
add cucumber tests for post searching, case #12
Merge branch 'feature/#13/new-social-icons'
Merge branch 'feature/#12/search'