windows-build-deps: update to Qt 4.8.4 (re: #633). Remember to rebuild QtScriptGenerator, QtPropertyBrowser, and QXmpp, when updating to newer Qt.
windows-build-deps: Build bullet in both release and relwithdebinfo modes. It only gets built once so this made it impossible to swap between Release and RelWithDebInfo modes in Tundra as you only had one or the other resulting from the deps build.
Remove Qt modules which we won't be needing (most notably QtDeclarative) from the build. TODO: Ubuntu and OSX deps script needs to be adjusted too.
Merge remote-tracking branch 'remotes/admino/admino_dep_changes' into incoming