Add BOM and DNP exclusions

Add ability to exclude FP from BOM using "Exclude from Bill of Materials" checkbox FP attribute.
Add ability to DNP a FP by checking "Do not Populate" checkbox FP attribute.

Author: SFE-Brudnerd

SparkFunKiCadBOMGenerator/plugin.py

@@ -69,6 +69,8 @@ def Run(self):
             for footprint in self.unwanted_footprints: # Check for KiBuzzard etc.
                 if footprint in pack:
                     unwanted = True
+            if sourceModule.IsExcludedFromBOM():
+                unwanted = True
             if not unwanted:
                 ref = sourceModule.Reference().GetText()
                 val = sourceModule.Value().GetText()
@@ -98,7 +100,7 @@ def Run(self):
                         if not head_tail[1].isnumeric():
                             prod_id = ">> INVALID <<"
                 uniqueRef = name + val + prod_id
-                if hasProdID:
+                if hasProdID and not sourceModule.IsDNP():
                     if "EMPTY" not in prod_id and "INVALID" not in prod_id:
                         prodIdNum = prod_id.split("-")[1]
                         while prodIdNum[0] == "0":