New Intention Action: Invert If Condition

Inverts the conditional expression in an if expression.
Implemented Operator To Function intention action.

Converts +a, --a, a * b, a..b, a %= b, a in b, etc. to their function call counterparts.
Removed LabelName class, used Name instead
Removed cache for labeled elements
Resolve labels on the fly
Made LabelResolver a component
LabelResolver refactoring: removed 'reportUnresolved' parameter
LabelResolver refactoring: public methods