intall papertrail migrations
Add OrderVersion model
Add pry gem to development and test groups
Add versioning logic to orders+products
Add versioning logic to orders+taxons
Add versioning logic to orders+variants
Add PaperTrail to Spree::OptionTypes
Add versioning logic to orders+option_types
Add versioning logic to orders+option_values
refactor of version store Hash (Spree::OrderVersion.status)
refactoring version access methods
Add versioning logic to orders+product_property+property
Add model spec's
Add pruduct version helper method spec's
order_version_option_type_and_value_helpers spec's
order_version_option_type_and_value_helpers spec's
order_version_taxon_helpers spec's
order_version_variant_helpers spec's
add backend hisotry to orders
improve Readme