Tax system

- New tax system
- Advisor window modeled after SC3k's
- Advisor start_dialogue() function is now connected to a SimEvent "advisor_message" signal
- Advisor windows are now autoloaded and no longer part of the core interface node
- Added 3D buildings from Micropolis repo

scripts/tax_window.gd

@@ -0,0 +1,43 @@
+extends WindowDialog
+
+onready var res_slider = $TaxSlidersCtr/ResCtr/ResSlider
+onready var com_slider = $TaxSlidersCtr/ComCtr/ComSlider
+onready var ind_slider = $TaxSlidersCtr/IndCtr/IndSlider
+
+onready var res_rate = $PrecentCtr/ResPctLbl
+onready var com_rate = $PrecentCtr/ComPctLbl
+onready var ind_rate = $PrecentCtr/IndPctLbl
+
+onready var annual_income = $IncomeCtr/IcnomeLbl
+
+func _ready():
+	if SimData.res_tax >= 0:
+		res_slider.value = SimData.res_tax
+		res_rate.text = str(SimData.res_tax) + "%"
+	
+	if SimData.res_tax >= 0:
+		com_slider.value = SimData.comm_tax
+		com_rate.text = str(SimData.comm_tax) + "%"
+		
+	if SimData.indust_tax >= 0:
+		ind_slider.value = SimData.indust_tax
+		ind_rate.text = str(SimData.indust_tax) + "%"
+		
+func _process(delta):
+	var total_income = int(SimData.res_income + SimData.comm_income + SimData.ind_income)
+	
+	
+	if total_income >= 1:
+		annual_income.text = "Income: " + SimData.currency + str(total_income) + "/yr"
+
+func _on_ResSlider_value_changed(value):
+	SimData.res_tax = int(value)
+	res_rate.text = str(value) + "%"
+
+func _on_ComSlider_value_changed(value):
+	SimData.comm_tax = int(value)
+	com_rate.text = str(value) + "%"
+
+func _on_IndSlider_value_changed(value):
+	SimData.indust_tax = int(value)
+	ind_rate.text = str(value) + "%"