Add .mailmap file to get git-shortlog(1) right

The commit history contains several different email addresses for
Richard Hartmann, add .mailmap to map them all into one.

9d2da280-77a1-11e3-a114-001f3b596ec9
Merge remote-tracking branch 'sunny256/add-mailmap'

I don't see diverging histories locally, but that may be because of my
local setup.

No hurt in merging this, though.
Move debian_meetings/ -> Debian/
Move Debian/debconf13/ -> Debian/DebConf13/
More cleanups
add Aussie Linux Conf 2013

squash rename lca folder
added Debian 2012

squash deb2012 trivial rename

squash deb2012 move
add Aussie Linux Conf 2013

squash rename lca folder

LCA 2014 still in progess, removing temporarily
added Debian 2012

squash deb2012 trivial rename

squash deb2012 move
Debian 2011

squash Debian 2011, debconf high

squash Debian 2011, debconf low

squash Debian 2011, cleaning up filenames
LCA 2014

squash LCA 2014, wednesday

squash LCA 2014, thursday
LCA 2012
LCA 2014 new thursday videos
Add Linux Conf AU (linux.conf.au - LCA) 2014 presentations
Merge remote-tracking branch 'refs/remotes/Millak/master'
Move LCA/2014 to Linux_Conference_Australia/2014
README.md: Update
cleaning up
Merge remote-tracking branch 'refs/remotes/upstream/master'
Merge remote-tracking branch 'refs/remotes/origin/synced/master'