Make sure that the user have enough quota in order to use the filesystem.
If the use doesn't have enough quota, fallback to USE_FS = false and make sure the file is under 250MB, else the user can't participate in this swarm.
#46: Checks the user's filesystem quotas accroding to file size and o…
…nly if available uses the filesystem
added apiValidator for filesystem
#44: progress bar for loading the file added
#40: reseed and resume works if previously used filesystem
Changed block size