Updated gemfiles and submodule commit references.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Added the nuke script for facilitating removal of unlicensed material.

The nuke script allows other developers to remove material that I hold
the copyright to and that I have not licensed. In terms of the fork,
they simply act as placeholder images until the fork's developer creates
their own assets.

Nuke is helpful because the alternative would be manually sifting
through files and directories and removing material that way.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated some template and layout files.

Footer information updated.

Blog post layout now checks to see if any related posts are available
before rendering the list. Otherwise, there would be a "Related Posts"
header with an empty list.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Updated plugins.

Related posts now passes null if no posts are available so that the
liquid engine can perform a check. Markdown has a bugfix relating to a
bad return value of the html output.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>