Reorganized Windows includes.
Bumped version to 4.3.1.1 in preparation for upcoming bugfix release.
Modified the Doxyfile templates to use 'dot', when available, to generate class diagrams instead of the inferior diagram engine bundled in doxygen.
Removed ambiguous file extension on doxygen-formatted documents (.doc to .dox).  Updated formatting in RELEASE_NOTES.md to correct an issue with the resultant html file generated by Doxygen.
Converted netcdf-c.texi to a rough markdown document, added links to the doxygen documentation.
Created rough markdown versions of each texinfo document.  These markdown files need to be updated and formatted.
Removed stray .texinfo-style tags.
Begin removing misc. detritus generated by pandoc and/or texi2html.
Added a file containing netCDF-C error codes.  It appears that the documentation will need to be reorganized as it is largely out of date.  A lot of the old texi information is present in the doxygen-generated documentation, but the organization is different, as is the overall layout.
Merge branch 'integrate-old-docs' of https://github.com/Unidata/netcdf-c into integrate-old-docs

* 'integrate-old-docs' of https://github.com/Unidata/netcdf-c:
  Added a file containing netCDF-C error codes.  It appears that the documentation will need to be reorganized as it is largely out of date.  A lot of the old texi information is present in the doxygen-generated documentation, but the organization is different, as is the overall layout.
  Begin removing misc. detritus generated by pandoc and/or texi2html.
  Removed stray .texinfo-style tags.
  Created rough markdown versions of each texinfo document.  These markdown files need to be updated and formatted.
  Converted netcdf-c.texi to a rough markdown document, added links to the doxygen documentation.
  Removed ambiguous file extension on doxygen-formatted documents (.doc to .dox).  Updated formatting in RELEASE_NOTES.md to correct an issue with the resultant html file generated by Doxygen.
  Begin removing misc. detritus generated by pandoc and/or texi2html.
  Removed stray .texinfo-style tags.
  Created rough markdown versions of each texinfo document.  These markdown files need to be updated and formatted.
  Converted netcdf-c.texi to a rough markdown document, added links to the doxygen documentation.
  Removed ambiguous file extension on doxygen-formatted documents (.doc to .dox).  Updated formatting in RELEASE_NOTES.md to correct an issue with the resultant html file generated by Doxygen.
  Removed ambiguous file extension on doxygen-formatted documents (.doc to .dox).  Updated formatting in RELEASE_NOTES.md to correct an issue with the resultant html file generated by Doxygen.