Basket conversion strategies
#M-305 Fixed
Made ICustomerAddressRepository readonly
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
#M-307 Fixed
A little refactor of the CustomerContext.
Needs to be checked (Member.ContentTypeAlias? == membertype in V7? ) ...

Updated basket conversion process.
Merge pull request #741 from rustyswayne/1.3.0

API fixes