More fixes for moving IE framework into Galaxy.

Wasn't able to get it to work but I made some progress before the kid woke up - here it is. A couple more comments:

We should find a way to abstract out this line `"interactive_environments": "${h.url_for('/static/scripts/galaxy.interactive_environments')}", ` so the ies don't have to depend on a specific Galaxy path like this. Maybe just setting `ie.environments_js_path` to `h.url_for('/static/scripts/galaxy.interactive_environments')` or something.

Also if there are fixed things that need to be set in the ini file like `password_auth` - we should pass those in as defaults to `load_deploy_config` instead of setting them in the ini file and telling deployer not to change them.

Just recording these issues here for anyone to work on - wasn't necessarily expecting you to tackle them. I'll try to take another crack at this either tonight or tomorrow.