merge debug and info views
plus enhancements:
* nicer presentation
* proper translations
* kill dead (modpython!) code
* fix repository stats (active thread count / add looping tasks information)
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/web usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/cubes/shared/data usr/share/cubicweb/cubes/shared
debian/tmp/usr/share/cubicweb/cubes/shared/wdoc usr/share/cubicweb/cubes/shared