Add STATIC_ROOT in settings.py
modify staticfiles to static in settings.py
Revert "modify staticfiles to static in settings.py"

This reverts commit 4017afec2628ce9027c84a708653376d7a84986b.
modify STATIC_URL = static to staticfiles
Add '/app/staticfiles' to STATICFILES_DIRS
do some test
do some test
modify template for blogs and blog