Unidata/netcdf-cxx4 v4.3.0 on GitHub

This is the 4.3.0 release of the netCDF C++ interface, based off of the code provided by Lynton Appel. Release notes are as follows:

Fixed an issue where the tests were failing silently, and the underlying NcType class could not properly determine the type name or type size reliably. [GitHub issue #30](See #30) for more information.
Changed NCXX_ENABLE_DOXYGEN option to an easier-to-remember ENABLE_DOXYGEN.
Added --enable-doxygen, -DNCXX_ENABLE_DOXYGEN=ON options to allow generation of netCDF-CXX4 documentation via doxygen using either configure or cmake, respectively.
Added netcdf-cxx4 to the Coverity Scan Dashboard.
Added open and close methods for NcFile. See Github Pull Request #18 for more information.
Added netcdf-cxx4 to travis-ci.org. See https://travis-ci.org/Unidata/netcdf-cxx4 for more details.
Added NcCompoundType methods getMemberName and getMemberIndex. See Pull Request #19 for more details.
Added cmake support to netcdf-cxx4, which will allow us to create a CDash continuous integration dashboard similar to those created for the netcdf-c and netcdf-fortran projects.
Added a travis-ci configuration file, .travis.yml.
Created RELEASE_NOTES.md.