Add automated tests for some mods (#605)

Depends on mineunit from https://github.com/S-S-X/mineunit

mesecons, mesecons_mvps, mesecons_fpga, and mesecons_luacontroller are now tested.

mesecons_fpga/spec/mineunit.conf

@@ -0,0 +1 @@
+fixture_paths = {"../.test_fixtures"}