cookie check before login. UI bug fixes.

- fixed redirect of login page for load balancing
- fixed display of session time
load test script and fixes
Merge pull request #60 from tanmaykm/tanmaykm

load test script. ui fixes
wip: notebook runner for loadtest
increase timeout for websocket
log and display additional cloudwatch stats
Merge pull request #62 from tanmaykm/tanmaykm

log cloudwatch stats for autoscaling
fixes for cloudwatch api calls
Merge pull request #63 from tanmaykm/tanmaykm

fixes for cloudwatch api calls
logrotate nginx access and error logs only

- other nginx logs are rotated by supervisord
- fix admin screen for firefox
added interact. dockerfile ver 9
Merge pull request #64 from tanmaykm/tanmaykm

Added Interact package. Few administration screen fixes.
changes for load balancing and auto scaling

- Special cookie for load balancer to track. This takes care of the situation where user logs out and wants to log back in immediately. Should also work for deployment across zones.
- On request of a new session, JuliaBox will redirect request through the load balancer if it can't handle any more load. If an older user sesion was present on this instance, it will be backed up to s3 before redirecting.
- The redirect scheme will also be used to actively try and have fewer instances loaded to peak capacity, rather than spread load out.
- Can shut down instance for scaling down. AWS auto scaling down may not work nicely with stateful instances. This needs some more work for limiting rate of scaling down, and handling the border case where the last two instances shut down simultaneously. Optional for now.

Also:
- added Ipopt package
Merge pull request #68 from tanmaykm/tanmaykm

changes for load balancing and auto scaling
Say hello to HN
Update index.tpl
Center message

Sorry about that
split into two lines
Bold not necessary
Rever HN message