[boxing-optimization] Refactoring: extracted common logic of working with local variable table into getValuesStoredOrLoadedToVariable
[boxing-optimization] Refactoring: reordering methods to usage places
[boxing-optimization] Changed strategy from enumeration of unsafe operations to permitted + INSTANCEOF added
[boxing-optimization] Minor refactoring: analyze-method added
[boxing-optimization] fixed isSafeCast, so it doesn't use Class.forName()
[boxing-optimization] tests added