Sponsors page - logos are missing + inconsistent CSS sizing

[ace-n]

1. Nucor's logo is missing
2. CSS doesn't cap logo size
3. Google has 2 logos

Image:

[ace-n]

1: Nucor's logo file is missing from prod - we can add this manually. Waiting on @zmmille2 for said logo.
2: [Hot]fixed by #326
3: @zmmille2 may be able to delete/expire this from Liquid's web interface. If not, will look into manual deletion.