Revert "Show liveness indicator (beating heart)"

This reverts commit 84c4298cd53445b38ff7a82e9abd772057975ef9.

Conflicts:
	gui/app.js
	gui/index.html
Don't deadlock while sending and receiving large indexes
Add bootstrap-3.1.1
Revamp UI (fixes #185, fixes #147, fixes #136, fixes #124)