Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Data/samples/Makefile

@@ -0,0 +1,15 @@
+#
+# Makefile
+#
+# Makefile for Poco Data Samples
+#
+
+.PHONY: projects
+clean all: projects
+projects:
+	$(MAKE) -C Binding $(MAKECMDGOALS)
+	$(MAKE) -C TypeHandler $(MAKECMDGOALS)
+	$(MAKE) -C RecordSet $(MAKECMDGOALS)
+	$(MAKE) -C RowFormatter $(MAKECMDGOALS)
+	$(MAKE) -C Tuple $(MAKECMDGOALS)
+	$(MAKE) -C WebNotifier $(MAKECMDGOALS)