scijava native loader must be within the same classloader as the consuming class #49

The JNI specification requires that the classloader of the caller of System.loadLibrary be the same classloader of the class attempting to consume the native methods. Since native-lib-loader tends to be a dependency of other libraries, and it is the mechanism which eventually invokes System.loadLibrary, it must be the case that all classes using native-lib-loader be loaded by the same class loader that loaded it.