Oregon State Librarian MaryKay Dahlgreen said she doesn’t think putting one person in charge of both Douglas County’s library system and museum is a good idea, but she recognized while speaking in Roseburg Tuesday that sometimes tight budgets leave no choice. “This community needs both a library and a museum. I think it’s important that they don’t become one organization,” she told a crowd at the Douglas County Library. The audience that filled the library’s Ford Community Room included members of the library and museum boards and county Commissioners Doug Robertson and Joe Laurance. They came to hear Dahlgreen’s take …