Merge pull request #4 from DigiDNA/master

Removed use of CFURLPathStyle in public headers as this might cause ABI ...
Now using C++11.
Removed C++ 98 compatibility warnings.
Preparing for copy & swap: assignment operator now takes its argument by value.
Copy & swap...
Merge branch 'master' of github.com:macmade/CFPP
Assignment operator now uses copy & swap.
C++ 11 move constructor.