Fixed some issues with GWT reflection and JSon
- Json was unable to create list for fields with type "List"
- Added list to the default "reflected" classes in GWT backend
- Fixed reflection generator to avoid that setters convert primitives types to java wrappers.
Merge branch 'master' of github.com:libgdx/libgdx into gwtreflection

Conflicts:
	backends/gdx-backends-gwt/src/com/badlogic/gwtref/gen/ReflectionCacheSourceCreator.java
	gdx/src/com/badlogic/gdx/utils/Json.java
Updated to switch case
Merge pull request #1005 from anserran/gwtreflection

Fixed some issues with GWT reflection and JSon