first draft of the manager for the users database

Very much a draft: accepts input from the command line, does not yet
return 'logged in' variables/messages for the client, does not yet fetch
from the (as-yet un-created) uploads database, etc. Pretty much just
records name/password combinations, checks that they exist, lists all
usernames and changes passwords.
updates to accountmanager

early unfinished draft of the account creation logic (some similar
upload database manager logic to come)
Merge pull request #1 from tyrianne/firstbranch

Firstbranch