Remove the path from account references in accounts structs (blocked by #59)

[mcintyre94]

In Anchor 0.2.5 there's an IDL parsing error when seeds reference an account that has a path, eg. pub post: Box<Account<'info, dot::program::Post>>,

See coral-xyz/anchor#2268

While this is fixed in Anchor, the fix hasn't been released yet and Seahorse users won't have a fixed version yet. Update: Fixed in Anchor 0.2.6 which is released + works with Seahorse

When the account is defined in src/dot/program.rs (as they are by default) then we can just remove the path, because we import dot::program::*. See #56

But for accounts defined elsewhere, we will need to also import their paths into src/lib.rs in order to do this. This will depend on a fix for #59

[mcintyre94]

@ameliatastic How are you thinking about supporting Anchor versions? If we drop support for 0.2.5 we can just close this since it's fixed in 0.2.6 which we support