Adding CMake options for C++11 mode and Unicode mode.
Adding CMake options for C++11 mode and Unicode mode.

mcg1969/nanodbc,nanodbc/nanodbc,ChrisBFX/nanodbc,nanodbc/nanodbc,mcg1969/nanodbc,norsync/nanodbc,norsync/nanodbc,ChrisBFX/nanodbc