store cart in database and display summary
add to cart
renamed items in cart structure
add "count" to cart item and updated model to support it (with tests)
show some info on cart content page
store user profile in database and display on relevant pages
comment with links to documentation abount profile types (person/company)
realign migration numbers based on refactoring branch
realign migration numbers based on master branch
Merge branch 'master' into shopping

Conflicts:
	atexpc/atex_web/admin.py
	atexpc/atex_web/models.py
	atexpc/atex_web/static/script/all.js
	atexpc/atex_web/templates/search.html
	atexpc/atex_web/tests.py
	atexpc/atex_web/urls.py
	atexpc/atex_web/views.py
	atexpc/settings.py
Django 1.5.1 upgrade
enable shopping buttons
refactor filter form to surround only filters and not entire page
fix simple search form on pages without product lists
show text input hints for signup/login page
show input text with black color instad of hint color
prepare processing of signup/login form
avoid duplicate step "02" indicator
finished django form declaration
show/hide signup form