Double load font in IE

Addressing issue where fonts will not load in IE8

relates to [#2504 state:open]
related to #447
Adding small Pinterest icon

I created this myself in a ad-hoc way, so possibly not the greatest

closes [#2572 state:resolved]
Update version
minify pinterest.svg
specify fontcustom dependency
new fontcustom config.
use new config to move files into place.
proper config.
most recent fontcustom.
update scss template
pinterest icon added.
version bump
update svgs.
update font.
non-destructive svgo!
updated icon font, added arrow-past