Added silent install mode
Changed password routine to get password from cloudman instead (shalib
and crypt use different schemes, which makes the previous solution
unworkable)
Skip silent mode install if researcher already exists.
Skip install only in silent mode.
Removed unused parameter.
Fixed unterminated string.
Renamed method
Fix for ipython_password when silent mode off.
Removed redundant check for preexisting researcher account.
Do not auto-load pylab or rmagic in notebook.
Move IPython Notebook from HTTPS to HTTP for now.