#6 Handling of java.lang. subpackages

[R. Lemos]

Classes of subpackages of java.lang, such as
java.lang.reflect.*, weren't written to the imports section.

This patch corrects this, discovering the full package
name, and comparing it to "java.lang".

Classes belonging to the java.lang package are still not
written to the imports section; only classes in the
subpackages were affected.

[R. Lemos]

src/mockmaker/MockMaker.java