Separate different roots, abstract away application setup

[martyall]

fixes #132

• introduces a Tagged variant of RawStore, with different tags for the different state roots.
• force modules to use more granular effect constraints to avoid redundant constraints.
• adds more tests to AuthTreeStoreSpec
• adds more e2e tests

fixes #108

• updates simple storage app to use the same application setup as nameservice

Misc.

• nested everything into appropriate directories, the hierarchy is now

└── Tendermint
    └── SDK
        ├── Application
        │   ├── App.hs
        │   ├── Handlers.hs
        │   └── Module.hs
        ├── Application.hs
        ├── BaseApp
        │   ├── BaseApp.hs
        │   ├── CoreEff.hs
        │   ├── Errors.hs
        │   ├── Events.hs
        │   ├── Gas.hs
        │   ├── Logger
        │   │   └── Katip.hs
        │   ├── Logger.hs
        │   ├── Query
        │   │   ├── Class.hs
        │   │   ├── Client.hs
        │   │   ├── Delayed.hs
        │   │   ├── Router.hs
        │   │   ├── Store.hs
        │   │   └── Types.hs
        │   ├── Query.hs
        │   ├── Store
        │   │   ├── AuthTreeStore.hs
        │   │   ├── RawStore.hs
        │   │   └── Scope.hs
        │   └── Store.hs
        ├── BaseApp.hs
        ├── Codec.hs
        ├── Crypto.hs
        ├── Modules
        │   └── Auth.hs
        └── Types
            ├── Address.hs
            ├── Message.hs
            ├── Transaction.hs
            └── TxResult.hs