some major changes to crypt plugins
- removed scrypt
	This was really just a demo and it did not really provide
	the needed security.
- removed aesctr
	This was just a stand in for basic AESCTR, but apon review
	I found it not only useless but very insecure because of
	the reuse of the nonce.
@ changed aesmulti
	Now, I use a single key called a master key, and I produce
	randomly using os.urandom sub-keys as needed per file and
	I encrypt the file using the sub-key then encrypt the sub-key
	with the master key and store it in the file header.