Added bootstrap CSS, started making erbs valid HTML
Implemented bootstrap.
Merge branch '1-3revisions' into v0.4.0

Conflicts:
	Gemfile
	Gemfile.lock
	labs.rb
	views/index.erb
	views/list.erb
Updated HTML, fixed config.ru, etc; also added the Remove Task feature from v0.5.0 by accident.
Deployed the v0.4.1 version to Heroku, added readme.md