Invisible Item Frames

Added an additional file with invisible map item frames.
Descriptions now show version numbers.

Made the background of Item Frames invisible for versions below 1.8.
Shortened the pack description.
Updated the pack format to make it work for multiple newer versions without warning the player.
Added an icon for the resource pack.

Changed pack_format to 9.
Added a dot at the end of the description.
Changed the texture to be up instead of down.

Removed one line.
Changed pack_format to 7.
Added an additional file that makes Glow Item Frames invisible too.

Removed lines in pack.mcmeta.
Removed colors in description.
Removed blockbench credits.
Changed the model so that it works for 1.8+ instead of 1.13+.