added buttons, FE styling
buttons
Merge branch 'FrontEndDev' of https://github.com/EJEHardenberg/GreenUp into FrontEndDev
added second button image, started JS to change image when clicked
Merge branch 'master' of https://github.com/EJEHardenberg/GreenUp
Merge branch 'master' of https://github.com/EJEHardenberg/GreenUp