move into _compat
remove Flask-Uploads #74
fix test_uploads for python 3
bug fix for python 3 on basestring
travis for python 3.3.
missing pytz for babel
remove test requires of Flask-Testing and Flask-Uploads
way to validate csrf data. no need for replacing SessionSecureForm, close #78. API `validate_csrf_data` for #57
drop sqlalchemy ext #35
no need for __all__, #35
rename compat string_type to text_type
clean docs and doc string on form
docs on i18n
clean flaskr example
add example links for #44
replace SessionSecureForm with csrf. #78
pep8 for test_validation.py
add valid csrf module. #78
use time.time instead of datetime
make csrf protect a class, add exempt decorator