Change how resource type works, allow proper app and library installation (#956)

* Change how app store types work, allow proper app and library installation

* Add node for resources in dependencies and docs

* Fix NPE without `type`

* Fix docs trying to change location of app type resource

* Separate libraries and apps and add trash for them

* Update docs

* Create trash directory if it doesn't exist

docs/scarpet/language/FunctionsAndControlFlow.md

@@ -141,6 +141,10 @@ but if symbols are used directly in the module body rather than functions, it ma
 Returns full list of available symbols that could be imported from this module, which can be used to debug import 
 issues, and list contents of libraries.
 
+You can load and import functions from dependencies in a remote app store's source specified in your config's `libraries` block, but make sure
+to place your config _before_ the import in order to allow the remote dependency to be downloaded (currently, app resources are only downloaded
+when using the `/carpet download` command).
+
 ### `call(function, ? args ...)`
 
 calls a user defined function with specified arguments. It is equivalent to calling `function(args...)` directly