Update Build#1

It's duodi today, time to update primidi !

If you want to know how to use every Primidi's features, please read the Readme file provided. But before that :

Yay new things !

• Added an fps option in the config file
• Added a speed factor in the config file
• Added a start bpm and offset in the config file
• Notes can now have a custom width and position
• Notes can now use a custom sprite !!
• Sprite are now defined in the skin.json
• You can now put a foreground picture if you need one
• Custom cursor if you want to pimp your midi to the next level

And a bunch of fixes, too !

• Windows: fixed window moving outside/not being resized when going back from fullscreen
• Fixed a crash when closing the window
• Fixed midi files with upper case letters in the extension not being read
• Minor fixes...