Emacs: Force using line comment even in c-mode.
Refresh pathes for Mavericks.

Install Mavericks freshly with newly-partitioned partitions.
Emacs: Update magit.
Git: Setting push.default for future Git 2.0.
Emacs: Let org-mode add a strike-through on DONE items when exporting

The strike-through is on headings, and only for LaTeX.  Sometimes
org-mode will export a heading with a short form, for example
something like

    \section[short title]{Loooooooooooonnng title}

then this configuration fails.  See http://stackoverflow.com/q/18934436/782130
Emacs: Set LaTeX packages for org export.