Loading local Dapps from FS. (#1214)

* apps list to separate module

* Preparing to support serving files from disk

* Serving files from disk

* Using dapps path from CLI

* Adding more docs

dapps/src/api/mod.rs.in

@@ -18,3 +18,4 @@ mod api;
 mod response;
 
 pub use self::api::RestApi;
+pub use self::api::App;