Includes templates and create scripts for quickly developing qt-based ros packages.

• roscreate-qt-pkg for quickly templating a qt-ros package.
• Includes a master chooser as a docking element.
• Rosbuild and rosbuild2 supported.

• Check if we still need cmake support for mingw's static builds.
• Support more templates.
• Spin off into a separate python module.
• QDesigner elements.