fixes
Merge pull request #6 from inspiran/master

Adjusted mapping to allow multiple product descriptions
Merge pull request #7 from iampersistent/feature/simple-billing

fixes
Fixed some tests
Update README.md
move into product manager slugify method
set method public slugify
Merge pull request #8 from cordoval/master

move into product manager slugify method
update documentation
Merge pull request #9 from cordoval/master

update documentation
add missing notifications
Merge pull request #10 from cordoval/master

add notifications
add setProductSKU method to ProductManager
Merge pull request #11 from iampersistent/master

add setProductSKU method to ProductManager
add BrandManager
move SpecificationInterface to commerce
Merge pull request #12 from iampersistent/master

add brand mgr, move Spec interface
add BrandGateway and BrandSpec
reorganize specs, update brand persistence
adding tests for gateway & specs