Merge pull request #39 from elemoine/photo-upload

Photo upload
Add jQuery Steps
Support custom_property and validate_only in view
Create wizard for pully form
Update i18n
Move setup code for jQuery Steps into lib
Fix ol3 attribution css in wizard

And fix a type in the tests.
Merge pull request #41 from tsauerwein/steps

Add support for wizards
Use pyramid_chameleon
Convert "site" template from Mako to Chameleon
Convert "form" template from Mako to Chameleon
Convert "list" template from Mako to Chameleon
Convert "view" template from Mako to Chameleon
Convert "edit" template from Mako to Chameleon
Change comment in subscribers.py
Remove pyramid_mako
Remove mako file extension from lingua.cfg
Upate "de" po file
Upate "fr" po file