porting to python 3
django-mailer excluded from dependencies
Merge branch 'remove_dependencies' into python3

Conflicts:
	setup.py
Merge branch 'remove_dependencies' into python3
Merge branch 'master' into python3
Merge branch 'master' into python3
tests: open attachment file in 'rb' mode, take into account 'true division' of ints in python 3
Merge branch 'master' into python3

Conflicts:
	pybb/signals.py
	pybb/templatetags/pybb_tags.py
	pybb/tests.py
	test/example_thirdparty/urls.py
fixes after merge
Merge branch 'master' into python3
removed unicode string prefix
exclude python 3 from testing on django 1.4
unused broken import
fixed travis config
open files in tests as bytes
set page title in add_post
fix a typo
approve "Views count"
finish untranslated msgs
add chinese translation