Mocking the send_to_char function to check messages to the user. Still doesn't work for act() though. Requires libmocka-dev and libunwind-setjmp0-dev
Also, started setup for testing do_remove and introduced a bit of shorthand macros.
Main method extracted to separate file to make it easier to test the _rest_ of the code. munit is added as a submodule by running `cd src; git submodule add https://github.com/nemequ/munit.git` . Unit testing has so far only been tested on ubuntu.
