* Add linter to check svg path dimensions
Float precision is set at 3 which is the default for svgo in .svgo.yml;
precision can be raised over time.
This adds an ignore file with the current paths of non-conforming icons.
This also changes the name of the icon title linter as well so it reads
more nicely than "custom".
* Update CONTRIBUTING GUIDELINES
Add a note on visual imperfections and viewbox problems due to
optimizing.
Co-authored-by: Eric Cornelisesn <ericornelissen@gmail.com>
Co-authored-by: Peter Noble <PeterShaggyNoble@users.noreply.github.com>
