add github config and icon
add github icon
change github link to user/organisation
css clean-up
convert feedicon to png
maximize number of atom feeds to 5
Merge branch 'master' of https://github.com/gertjanvanzwieten/jekyll-template

Conflicts:
	_config.yml
Merge branch 'master' of https://github.com/gertjanvanzwieten/jekyll-template

Conflicts:
	index.html