NcException: changed member variables to std::string*
Replaced several bitwise OR with logical OR
Made ncCheck argument file 'const char*'
NcException copy constructor and assignment operators defined
Fixed bug in test of compound type fill value
Update README.md
Merge branch 'exception_membervars' of https://github.com/jarlela/netcdf-cxx4 into jarlela-exception_membervars
Changed nullptr to NULL for compilers not at C++11 yet
Merge branch 'compiler_warnings_operators' of https://github.com/jarlela/netcdf-cxx4 into jarlela-compiler_warnings_operators
Merge branch 'compiler_warnings_Wwrite-strings' of https://github.com/jarlela/netcdf-cxx4 into jarlela-compiler_warnings_Wwrite-strings
Merge branch 'test_type' of https://github.com/jarlela/netcdf-cxx4 into jarlela-test_type