Added Create Shopping cart and Add customer to shopping cart operations

Signed-off-by: Kalyan <kalyan.menda@whiteskylabs.com>
Merge branch 'master' of git@github.com:kalyanwsl/magento-usecases-raml.git into create-shopping-cart-order

Conflicts:
	mule-project.xml
	pom.xml
	src/main/app/mule-deploy.properties

Signed-off-by: Kalyan <kalyan.menda@whiteskylabs.com>
Merge pull request #2 from kalyanwsl/create-shopping-cart-order

Create shopping cart order