added icons tutorial to the summary
Merge branch 'feature/bootstrap'

Conflicts:
	build/GLOSSARY.html
	build/index.html
	build/search_index.json
	build/tools/composer/creating.html
	build/tools/composer/faq.html
	build/tools/composer/installing.html
	build/tools/composer/introduction.html
	build/tools/console/faq.html
	build/tools/console/installation.html
	build/tools/console/introduction.html
	build/tools/console/usage.html
	build/tools/vagrant/faq.html
	build/tools/vagrant/howto.html
	build/tools/vagrant/introduction.html
	build/tutorials/introduction.html
	build/tutorials/templates/bootstrap.html