v1.0.1

Feature release 1.0.1 adds support for returning objects from functions, which allows for the creation of "factory functions" for Abaci classes. The Windows executable has a known bug, where exceptions thrown in lib/Abaci.cpp are not caught by the runtime. These exceptions are triggered by code such as class c() endclass let o <- c() print int(o). At present the solution for fixing the build is not known.