#69 Qualified package names missing

[James Devenish]

Currently, JavadocUtil does not correctly detect when qualified package
names are necessary. Basically, whenever hyperlinks are not used and a
referenced class is in a different package to the current class, the
qualified package name should be rendered. The current logic does not
detect the conditions correctly.

The attached patch gives some guidance for better logic (i.e., works for
me...). Note that the correct logic requires that PDFDoclet be patched to
honour the "create.links" configuration properly. This is implied by
"Configuration.hyperlinks" in the attached patch.

[James Devenish]

Render qualified package names when required