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/ODBC/Makefile

@@ -0,0 +1,19 @@
+#
+# Makefile
+#
+# Makefile for Poco ODBC
+#
+
+include $(POCO_BASE)/build/rules/global
+
+include ODBC.make
+
+objects = Binder ConnectionHandle Connector EnvironmentHandle \
+	Extractor ODBCException ODBCMetaColumn ODBCStatementImpl \
+	Parameter Preparator SessionImpl TypeInfo Unicode Utility 
+
+target         = PocoDataODBC
+target_version = $(LIBVERSION)
+target_libs    = PocoData PocoFoundation
+
+include $(POCO_BASE)/build/rules/lib