requirement clean up

clean up
Remove django-behave(unstable), pep8(included in flake8)
[ci skip]
Add documentation for views

doc
Add admin view documenation
Fix a small type in user managers [his_active -> is_active]
[ci skip]
Change to new UI

ui update
use twitter bootstrap flaty
add url for login, password_reset
[ci skip]
Change sql script

SQL
Drop before create
Add warning for user to change password before use it
[ci skip]
Add new fixtures

fixtures
formart json file
add site fixtures
[ci skip]
Add LOGIN REDIRECT

bug fix
redirect to '/' by default
[skip ci]
Add password_reset

feature
Add password_reset
small change on url
refactor form errors into a template
[skip ci]
Change admin url

change admin url to /hdadmin/, don't use default
[ci skip]
Finish password reset

feature
Add templates for password reset
Remove unused link in base
[ci skip]
Use default bootstrap flatly

change css
Use default flatly css
Fix nav bar shown in login page bug
Use bootstrap-datetimepicker instead of django default
[ci skip]