Added ability to read linedef lumps. Also added all the test functionality to make sure we are reading the linedefs correctly.
Added in the ability for us to detect Vertex lump types. Every lump is no longer being flagged as a LumpType::Unknown. Also added in the testing framework to make sure that we are loading up the correct number of vertex lumps from the wad file.
Added the ability to load vertex data from the WAD. Still needs some processing to make more robust, but for now is loading data.
