Add ability to automate the creation a new blosxom entry.

Add ability to automate the creation a new blosxom entry.

* examples/mwolson/muse-init.el: Move new entry section to
  muse-blosxom.el.  Modify the key settings in my example accordingly.

* muse-blosxom.el (muse-blosxom-footer): Just use the empty string, since
  Muse always makes sure that the file ends with a newline.

* muse-blosxom.el (muse-blosxom-markup-regexps): Remove this, since
  planner markup is now provided automatically by the planner port to
  Muse, and we don't have any customized markup.

* muse-blosxom.el (muse-blosxom-base-directory): New customizable
  variable that specifies where the base directory of your blog entries
  is found.

* muse-blosxom.el (muse-blosxom-get-categories): Get the categories from
  the base directory.  Explore categories recursively.

* muse-blosxom.el (muse-blosxom-title-to-file): Helper function for
  `muse-blosxom-new-entry'.  Turns the given title into a lowercase, sans
  special characters file name.

* muse-blosxom.el (muse-blosxom-new-entry): Automate the process of
  making a new blog entry.  It will prompt you for a category, then a
  title, and then will create a new file that has the date and title
  inserted.
git-archimport-id: mwolson@gnu.org--2005/muse--main--1.0--patch-52