started ntor prototype
scalarmult prototype
ntor prototype; needs refactoring and TESTING
did a little cleanup, some freactoring of ntor handshake'
moved sha1_digest() to util
ntor prototype
Added create2 and created2 class stubs to this branch.
created extended cells
removed extend2/extended2 cell prototypes
update .gitignore
removed erroneously added _trial_temp
merged Crypto branch