dynamics/blocking_scheme: delete connect() in documentation
doc: Fix formula for shear viscosity calculation
doc: Add title to signal module

This fixes a build warning:

.../doc/modules/utility/index.rst:10: WARNING: toctree contains reference to
document 'modules/utility/signal' that doesn't have a title: no link
will be generated

http://my.cdash.org/viewBuildError.php?type=0&buildid=476501