Add stock_location_search_stock

stock_real and stock_virtual on stock.location can be searched
Translation files for stock_location_search_stock
Display only lines > 0, negative lines are not interesting
Add tests for stock_location_search_stock

Also add a missing import
E124 closing bracket does not match visual indentation
Merge pull request #15 from guewen/stock-location-search-stock

[ADD] stock_location_search_stock