Pack JSON Download file format

MCMU allows for incremental updates, aka only updating the mods that have changed, it does this by using a MD5 hash of the file. Without the MD5 hash the program will not work properly.

keys for download file: ''' URL: (Required) Direct download URL of the file (do not use cuseforge's latest link) Hash: (Required) MD5 hash of the file, used to find updated mods FileName: (Required) Filename of the mod to be downloaded (Combines with Ext to produce <FileName.Ext> Ext: (Optional) Used to override the file extension of the mod, useful for litemods, defualts to .jar (auto detects disabled mods and doesn't update them) Side: (Optional) is either Client or Server, anything else will not work, defaults to both '''

an example download file json:

{
   "URL":"http://minecraft.curseforge.com/projects/mcmultipart/files/2312807/download",
   "Hash":"5adb21b081d2232da3c42dea3b4d3cd3",
   "FileName":"MCMultiPart"
}