Fix type inferencing, syntax highlighting and code navigation for outer class member references

[eric-milles]

Consider the following:

class A {
  private static X = 1
  static getX() { 2 }
  static class B {
    void test() {
      println X
    }
  }
}
new A.B().test()

When executed, this prints 2. However, the variable expression "X" is indicating a reference to the class variable not the accessor method.

[eric-milles]