Reworked the code for loading and dealing with WAD files. The code now makes more sense and is much much easier to use. This should close issue #7.
Added the ability to parse the directory and store it in a Directory struct. This data has utility functions that can be used to work with the directory to find any lump we could need. This patch should fix up issue #3.
First run of WAD loading. Is able to read the header of the WAD file.
Initial commit which pushes up a bare cargo project with the shareware version of doom added.