add fixmindelo cobrand
strip white background back on small logo in sprite
some green borders on the front page sections, etc, for mindelo
change nav-link tag to green
fix report-a-problem-btn colour fixmindelo
more transparency in mindelo logo

specifically the mountain in the logo was colliding with the top menu at
some widths; use transparency around logo instead of block white
Factor CSS so that all SCSS is under cobrand, and non-SCSS is in css/ under that.
Merge branch 'fixmindelo'
fix relative css path in reading cobrand