Fix Our Wedding section view on mobile.

- Wrap the card-layout section in a grid class.
- Move card-layout outside of the p element.
Set all links to red heart color.
Style the email address and submit input boxes.

- Fix the section to use gridism.
- Add a border radius around them.
- Set email to 3/4 and submit to 1/4.
- Set input elements to 100% width of parent element.
Use floatlabels.js for the email textbox.

- Include the floatlabels javascript file sourced from GitHub.
- Add floatlabels.js to open source usage section in readme.
- Include javascript files within body.
- Set an id on the email input textbox.