[-] BO : Fixes for Advanced Stock Management Import
[*] BO : Combinations import supports Advanced Stock Management
[*] BO : Advanced Stock Management import now supports stock increase
[*] BO : Advanced Stock Management stock unit price uses wholesale_price (Product Cost) or 0.00001 if not set
[*] BO : Added Advanced Stock Management to csv import docs
Merge pull request #1105 from PhpMadman/1.6-CSVAvancedFixes

[-] BO : Fixes for Advanced Stock Management Import