Redid the entirety of the Chapter Icons

- For instance, the chapter icon, On a Rail, was changed to Map B instead of the end of the Power Up map
- Added a version for Essential mods like Staff Revamp and Improved Choreography
- Added a version for Improved Xen
- Added a version for Classic Models including a version for Improved Xen
- Added a compressed archive of all the uncompressed Screenshots in a .zip file

Unfortunately, it does take more time to install the Workshop addon when you subscribed to it. I will make separate workshop versions for the other versions in the future. Sorry, but I don't have the time for it right now.

- Updated Icons for:
- Unforeseen Consequences: New take
- Office Complex: New take that looks very much like HL1's chapter icon
- Power Up: New take. Not accurate to HL1's chapter icon but you can see more of the area in the image.
- Apprehension: Added muzzleflashes to weapons.

Remember, these icons are supposed to remain faithful to the original Half-Life Source Chapter Icons angles. Intentionally or Unintentionally.