ne_version_match, ne_version_string — library versioning
#include <ne_utils.h>
| int ne_version_match( | int major, | 
| int minor ); | 
| const char *ne_version_string( | void); | 
The ne_version_match function returns
    non-zero if the library version is not of major version
    major, or the minor version is less than
    minor.  For neon versions 0.x, every
    minor version is assumed to be incompatible with every other minor
    version.
The ne_version_string function returns
    a string giving the library version.