add black logo
display white logo on site
Merge branch 'logo'
update participate heading text on homepage
change form select element to checkboxes
update form validation to act correctly with checkbox items
update navigational links and buttons style

to be clickable full-width
changed participate form back to use select

for better ux on mobile devices (iOS)

fixed styles and validation issues
Merge pull request #16 from bkeyvani/master

Update Participate Form