Update README.md

fixed character trimming/ignoring not working in unified blend building

added sound file name trimming (ignore 1st and last chars), added ano…

…ther help button.

fixed update checker not giving a Yes/No option when a new version co…

…mes out

fixed update checker not being able to check for new builds

optimised the code a bit and added an ability to open the art when yo…

…u create it

added a new function (lets you build a blend without seperate on/offl…

…oad) and fixed .mp3 files breaking the rpm reader.

prevented being able to start building another blend with an already …

…ongoing one

fixed a dumb mistake