[Simple-support] some issues

[Federico F. <fed...@fi...>]

here are three issues I'm having

The return type is incompatible with LinkedList<InputNode>.push(InputNode)
InputStack.java @ line 95

The return type is incompatible with LinkedList<OutputNode>.push(OutputNode)
OutputStack.java @ line 104

these two errors occur when you try to build simple against jdk >=1.6.
it's due to jdk6 having added "void push" method to LinkedList
they were present even in simple 1.2 (the first version I've used)

===========================
and here's the stack trace of the third error. this occurs since 1.3: I
haven't had it with 1.2.1

java.lang.ClassCastException:
sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl
    at simple.xml.load.ReadPart.getDependant(ReadPart.java:113)
    at simple.xml.load.MethodContact.<init>(MethodContact.java:79)
    at simple.xml.load.MethodScanner.build(MethodScanner.java:285)
    at simple.xml.load.MethodScanner.build(MethodScanner.java:258)
    at simple.xml.load.MethodScanner.build(MethodScanner.java:234)
    at simple.xml.load.MethodScanner.scan(MethodScanner.java:106)
    at simple.xml.load.MethodScanner.<init>(MethodScanner.java:86)
    at simple.xml.load.Scanner.method(Scanner.java:361)
    at simple.xml.load.Scanner.process(Scanner.java:334)
    at simple.xml.load.Scanner.scan(Scanner.java:248)
    at simple.xml.load.Scanner.<init>(Scanner.java:104)
    at simple.xml.load.Source.getName(Source.java:222)
    at simple.xml.load.Traverser.getName(Traverser.java:192)
    at simple.xml.load.Traverser.write(Traverser.java:137)
    at simple.xml.load.Traverser.write(Traverser.java:120)
    at simple.xml.load.Persister.write(Persister.java:440)
    at simple.xml.load.Persister.write(Persister.java:422)
    at simple.xml.load.Persister.write(Persister.java:403)
    at simple.xml.load.Persister.write(Persister.java:513)
[... my test classes...]