Removed obsolete comments.
Using adduser not useradd so that added accounts are configured fully.
Adding script to create public_html redirect.
Removed obsolete sudo permissions and nginx references from ipython setup.
Add explanatory comment to add_public_html.sh
Bugfixes to setup_ipython_server.py
Added default non-sudo user 'researcher'; configuring ipython notebook under non-sudo user; moved per-user setup to separate script.
Merged account creation code into user setup script.
Creating symlink to galaxy app for research user.
Updated comments and README to reflect changes.