Tidy Spricon

Dipping into the file scared the bejesus out of me, so removed some unused/unnecessary parameters and tidied up the code

We no longer run svgo on the files in place, we do it as we pipe the svg data to base64 - means we wont have that annoying issue of checking in changed svg files, and could even leave the svg in a less compressed state  
shoudl be able to `^` svgo again now, thanks to this