fix issue #119
add position/sorting to PropertyGroups
fix tax rate request cache and tests
add LFS_FORCE_INTEGER_QUANTITY setting
remove previously added settings in favour of get_clean_quantity_value that uses quantity type set for product
add option to set shipping address as default at checkout form
fix address saving
updated docs; fixed request get
creation of default addresses
fix datetime format for French translation
allow for more than 9 payment methods
parametrized separation of default and selected addresses
updated docs
refactored, fixed tests
fixed creation of customer
added test for customer creation
clean up
more clean ups
updated migration script
cleaned up migrations