Bugfix for Open Files (Reported from Javier Velásquez)
Changes from Javier Velásquez:
bug in the Setter and Getter elements? (It only works with Double Type Variables)
updated and fixed the setter and getter code and icons...
added documentation and an example at "VirtualMachines\English Examples\FlowChart\Variables_JV\SetterAndGetterExample.vlogic"
modified the file "\myopenlab_source\src\VisualLogic\Basis.java" in line 354 to (Imporant)
