Added Twitter button
Deleted _site folder, that must not be on the repo
Merge branch 'gh-pages' of github.com:datasalt/splout-db into gh-pages

Conflicts:
	_site/architecture.html
	_site/features.html
	_site/gettingstarted.html
	_site/index.html
	_site/philosophy.html
	_site/user_guide.html
	_site/user_guide.txt