made the custom cursor logic better

it used to sometimes show the text cursor when it was not supposed to and it did not show the hand cursor on the projects link buttons

commits since last devlog

• 13c5a44 make custom cursors work better
• 29cd012 make readme use the jpg; jpg is faster than png
• b329790 new preview
• 2d56412 add backend shebang
• a985bc5 fix readme
• bb65dca fix custom cursor a bit
• 39561cb document licensing stuf