Fixed StackOverflowError when recursively visit object's field

Fixed StackOverflowError when recursively visit object's field. When
ReflectionLibraVisitor.visit(...) calculates size of an object, it
recursively goes through all its fields. If object contains a HashMap
which contains itself, a loop is formed.  I add a LinkedList to member
all processed fields to avoid the loop.
Delete unwanted .project file.