Bug#492657: epiphany-webkit: not ready to be included in a stable release

[Diego Escalante Urrelo]

As long as epiphany-browser defaults to epiphany-gecko, few people will
ever notice there's an alternative.

Maybe a notice to the package description could be added, like:
"""
(ephy standard desc)
.
This is the experimental webkit backend version of the browser, for an
stable browsing experience use epiphany-gecko package.
"""

IMHO, this is not an RC bug.