Move C++11 shim from contrib/ to autowiring/
Make include styles consistent
Added C++11 shim files to Autowiring sources

Now they should be installed properly
Add AutowiringConfig.h to list of autowiring sources

Also make sure we add_subdirectory after we generate configuration
files.
Merge pull request #134 from leapmotion/fix-c++11include

Fix C++11 shim installation