New BUFRLIB (10.2.3) library files and install script
Sample BUFR Files
Adding a placeholder file to maintain directory upon clone
Removing installcode.sh, since install.sh does the trick
Updated install.sh to compile/link with the new BUFRLIB libraries
Removing calls to obsolete (as of BUFRLIB 10.2.3) IUPBS1.  Only used for errorchecking and unneeded.
Updated convert.sh to be smarter in finding valid names and processing files. Also, removed references to grabbufr/cwordsh since these are now handled internally in BUFRLIB 10.2.3
Updated README