Initial index page for cog github page created.
Wrongly commited index page in master branch.
Added link to github page to README.
Modified cog.html so it could be better used as a template...

... for multiple cogs. Some more tweaks may be needed.
Adapted cog to create 2 templates, 1 for even, 1 for odd spoke count.
Add generated-cog, generating cog styles dynamically in js