Merge branch 'release/0.4.1' into develop
add badge to show download count.
ascii text
Update README.rst
remove duplicate and unused dependencies.
fix bootstrap submodule repo url.
fix article footer style problem.
bootstrap submodule update.
remove django-extensions.
remove template_context_processors dependency.
architect document added.
architect.rst
add cheat sheet in admin view.
form optimizations.
fix bootstrap module repo url.
use bootstrap 3 version.
bootstrap3 migration.
remove codeship image.
bootstrap3 migration.
install npm packages with fabric.