-Codechange: add a smallstack type
-Codechange: define a smallstack for station IDs
-Feature: use smallstack to allow for multiple next hops when loading and unloading
-Codechange: add index template type to SmallVector
-Codechange: refactor pool to make FindFirstFree and ResizeFor available for other containers
-Add: managed vector type
-Codechange: rewrite SmallStack to use a managed vector as storage