mapcrafter 1.5.3 (new formula)

Mapcrafter is a high performance Minecraft map renderer written in C++ which renders your Minecraft worlds to fancy maps viewable in any webbrowser.
Can this test be modified to do something more substantial than e.g. `--version` or `--help`? See `cmake.rb` for an example of an application formula with a good test and `tinyxml2.rb` for an example of a library formula with a good test. Thanks!