Image cropping

[Varzeki]

Some thumbnails incorrectly display as empty and will require manual cropping to 500x500

[ineeee]

i hated everything about your script and out.gen so i went ahead and redid the whole thing

the imagegen.rb was recreated (https://github.com/Varzeki/Homescreens/commit/3bf54bd4e33d2fb15274878b1e6ca6b1acb34dfc) to grab every folder inside data/ that contains something, generate some html, and write it to screens.html. also i dont know how to ruby so its probably broken or weird.

folder structure (https://github.com/Varzeki/Homescreens/commit/e44a40355ee02d743ac4719ba478855187cb3e9a and https://github.com/Varzeki/Homescreens/commit/7518a1de8bd53238339d6fa1f159b7d8e9c45186) before:

site/
 |--- css
 |--- fonts
 `--- images
   |--- full
   |--- webm
   `--- thumb_sq
      `--- contains 23 thumbnails (half were zero-byte files)

now:

site/
 |--- css
 |--- fonts
 `--- data
   `--- N
      `--- contains original image also a 400x COMPRESSED png

changes:

• removed old thumbnails (https://github.com/Varzeki/Homescreens/commit/c2f7df877881f7bbcbd9dbe0b2c0802dabd6b532)
• contemplated the lack of automatization in steps that took the user more than a minute
• added new thumbnails: 400x400 optimized and compressed for all of the 93 uploaded images (https://github.com/Varzeki/Homescreens/commit/77b368742e5f2ef3c0cebbde14482158dfc65ea6)

issues:

• i cannot figure out at all how to deal with video files, so they sit in images/webm/ without any changes

kthxbai