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/testsuite/Makefile

@@ -0,0 +1,40 @@
+#
+# Makefile
+#
+# Makefile for Poco SQLite testsuite
+#
+# For Unicode support, add following to COMMONFLAGS:
+#
+# -DUNICODE
+#
+# Unicode is supported only for UnixODBC
+#
+
+include $(POCO_BASE)/build/rules/global
+
+include $(POCO_BASE)/Data/ODBC/ODBC.make
+
+##################################################################################################
+# Note:                                                                                          #
+#  Do not change linking order or move this line up, these libs have to be linked in this order. #
+##################################################################################################
+ifneq ($(OSNAME),Darwin)
+SYSLIBS += -lltdl
+endif
+ifneq ($(OSNAME),FreeBSD)
+SYSLIBS += -ldl
+endif
+
+objects = ODBCTestSuite Driver \
+	ODBCDB2Test ODBCMySQLTest ODBCOracleTest ODBCPostgreSQLTest \
+	ODBCSQLiteTest ODBCSQLServerTest ODBCTest SQLExecutor
+
+ifeq ($(POCO_CONFIG),MinGW)
+	objects += ODBCAccessTest
+endif
+
+target         = testrunner
+target_version = 1
+target_libs    = PocoDataODBC PocoData PocoFoundation CppUnit
+
+include $(POCO_BASE)/build/rules/exec