IBSolver integrated. Old parser yet only used in AvatarActionAssignment (Florian's Code)

src/main/java/avatartranslator/AvatarActionOnSignal.java

...tartranslator/directsimulation/AvatarSimulationBlock.java

...atartranslator/intboolsolver/AvatarIBSAttributeClass.java

src/main/java/ui/AvatarDesignPanelTranslator.java

ttool/src/test/java/cli/CLIAvatarModelCheckerTest.java