JavaCL Generator Results import the wrong pointer class and use it incorreclty

[waynerasmuss]

The imported field class should be org.bridj.Pointer. Also, the constructors that use it should be like this:
public MyStructClass(Pointer<? extends StructObject> pointer) {
super(pointer);
}
instead if like this
public MyStructClass(Pointer pointer) {
super(pointer);
}

[ochafik]

Fixes mentioned in #421 are deployed in the latest 1.0-SNAPSHOT.