Image uploading from modpack edit page. (Fall back on old mirror urls if md5 was already set and icon/background/logo is false)
Public directory must be writable now (required!!)
Added resizer bundle
Removed resource requirement from creating a modpack
New packs use default resources until new ones are uploaded from the edit modpack page
Do not store md5 of default images or we can differentiate old versions of resources
Reverted to an older version of Resizer I customized to preserve transparencies