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/Zip/testsuite/TestSuite.progen

@@ -0,0 +1,11 @@
+vc.project.guid = 9665FC3C-DB71-4C6C-AAEE-AAFD73CB31E7
+vc.project.name = TestSuite
+vc.project.target = TestSuite
+vc.project.type = testsuite
+vc.project.pocobase = ..\\..
+vc.project.platforms = Win32
+vc.project.configurations = debug_shared, release_shared, debug_static_mt, release_static_mt, debug_static_md, release_static_md
+vc.project.prototype = TestSuite_vs90.vcproj
+vc.project.compiler.include = ..\\..\\Foundation\\include
+vc.project.linker.dependencies = iphlpapi.lib
+