Force world-readable permission on files and directory of the
themes installed by pelican-themes.
Only on posix system i.e. mostly non Windows
Rationale:
If the theme's files have only -rw------- permissions, once installed
system wide and owned by root, they will not be accessible to any user but only
root.
Certain configuration options are more useful in production than they
are in development. Some examples might be absolute URLs, external
analytics service identifiers, Disqus comments, etc. This version of the
quickstart script creates two configuration files: one for development
and the other for use when publishing. In addition, the related docs
have been expanded considerably. Last but not least, the quickstart
script will now detect whether there is a project folder associated with
the currently active virtualenv (if any) and use it by default.
I disliked having to do:
$ pelican-theme -r <theme-name> -i <theme-path>
So I modified install() to handle an upgrade of an existing theme. While doing
so, I noticed that in install() and symlink() the script would error with 'no a
directory' instead of 'not a directory'. So I fixed that for you as well.
