update ISR::Product don't compare against $args{selected} if it is undef
Merge pull request #11 from SysPete/product_fix

update ISR::Product don't compare against $args{selected} if it is undef
Restore link to UserAttributeValue result class in main POD.
Add SysPete to contributors.
Bump up version number.
Change author column to author_users_id in Media result class and link it to User result class.
Update copyright year.
Prepare Changes and README files for upcoming release.