fix(build): change livereload to use connect options

The "livereload: true" uses the default port 35729. When wanting to
change the default port in
connect.options.livereload, say because you simultaneously have several
projects opened at
the same time, this results in an error because the port is already in
use.
fix(build): clean subfolders of dist as well
fix(gen): do not use console to display messages

Messages should be displayed using the generator methods #log
chore(style): use 2 spaces for bowerrc file