Don't use "lodash" and "express" as ambient types

[ghost]

Ref: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/12394#issuecomment-298825183 These are declared as modules and should be imported, not referenced.

[Delagen]

Created repo https://github.com/Delagen/types-lodash with compiled version that support ambient mode