This PR updates Bootstrap, but it requires updating less-brunch since we
need less compiler 1.3.3 (bootstrap dependency).
updating bootstrap to 2.3.0
To anyone waiting for this pull request, you might be interested in this Brunch skeleton I made called "Brunch with Banana Pancakes". It's essentially Bacon & Eggs, but I always update to the latest libraries when they're released since Bacon & Eggs seems to be dormant. Banana Pancakes include Bootstrap 2.3.0.
Working on a major upgrade of eggs and bacon at the moment, unfortunately I got not so much free time. So yes, take @Anaphase advice and switch to Banana Pancakes for now