Create unit tests

[jake-bickle]

Creating unit tests is extremely important in ensuring Arachnid is stable. Stability is important for a long lasting crawl, as a crash could lead to lost data and wasting a lot of time (though issues #29 and #27 are looking to solve this issue). Unfortunately, tests have fallen by the wayside in this project. Nearly all the modules have no unit tests, and the existing tests are broken.