2.2.0

• Adds ChatterboxVariablesResetAll()
• CHATTERBOX_DIRECTION_MODE now defaults to 1 (treating directions as expressions to be evaluated)
• CHATTERBOX_DIRECTION_FUNCTION is now subject to a validity check on boot to help communicate how to set this feature up
• Adds ChatterboxVariablesClearVisited() and ChatterboxVariablesClearVisitedAll()
• <<jump>> can now evaluate expression i.e. <<jump ("smooch_" + $love_interest)>> will jump to the node given by the concatenation of "smooch_" and the value stored in $love_interest
• <<declare>> commands are now evaluated when a file is loaded rather than requiring any specific node in that file to be visited for variables to be declared. This behaviour can be toggled by setting CHATTERBOX_DECLARE_ON_COMPILE. Note that a source must be loaded for variables to be declared; Chatterbox doesn't know what variables exist in files it has not loaded!