Add Print Composers submenu to new Composer menu in composer

- Remove QgisApp::instance() usage in favor of already available passed in pointer to QgisApp
different icons for GPS importer and Create new GPX layer (fix #6860)
Make "Layer - New" accesible from QgsInterface, update GPS importer
plugin (fix #7202)
fix debian builds
Protect point and line pattern symbol layer from eating too much memory
debian packaging update
fix bug 7167, scale entered by user should work as expected
Merge branch 'master' of http://github.com/amitkulz/Quantum-GIS