Add code for C++11 in the Wild.
Add presentations.
Add presentations.
Add code for "Hourglass Interfaces for C++ APIs".
Placate Windows by tweaking filenames.

These filenames were preventing git clones on Windows machines.
Shorten folder names to placate Windows.
Shorten names further to placate Windows.

The longest filename in the Presentations directory is now 161
characters long.
Update header.
Add presentations.
Add presentations.
Add instructions for downloading a single file.
Add presentations.
Add lightning talks.
Add lightning talks.
Add presentations.
Add open sessions.
Update presentations.
Add presentations.
Merge pull request #1 from CppCon/master

Merge from master