Prefer python3 over python2 when both are available.
Both python2 and python3 should always exists.
More info at: http://legacy.python.org/dev/peps/pep-0394/
Conflicts:
src/core/utils/misc.h
src/searchengine/supportedengines.h
Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.