allow array_as_internal (through converter functions) to convert unicode that is castable as ascii
allow array_as_internal (through converter functions) to convert unicode that is castable as ascii

avalentino/PyTables,joonro/PyTables,FrancescAlted/PyTables,avalentino/PyTables,andreabedini/PyTables,andreabedini/PyTables,gdementen/PyTables,FrancescAlted/PyTables,andreabedini/PyTables,mohamed-ali/PyTables,gdementen/PyTables,mohamed-ali/PyTables,PyTables/PyTables,rabernat/PyTables,avalentino/PyTables,joonro/PyTables,andreabedini/PyTables,jennolsen84/PyTables,joonro/PyTables,gdementen/PyTables,rabernat/PyTables,jennolsen84/PyTables,rabernat/PyTables,mohamed-ali/PyTables,mohamed-ali/PyTables,PyTables/PyTables,PyTables/PyTables,jennolsen84/PyTables,jennolsen84/PyTables,joonro/PyTables,rabernat/PyTables,FrancescAlted/PyTables,gdementen/PyTables