Remove outdated hardcoded url from circuit simulator

Added new styles for sequence nav and reset some of the styles for inputs

Config changes relating to course server split

hotfix: eecs1 is inaccessible due to dead router; switch to qisx for pyxserver

merging now so it stops holding up content teams.

This needs a more permanent solution.

Fix user replication to Courses you're already enrolled in

Add jQuery scrollTo to courseware.

Fix CustomResponse for 6.002x
changes affect 6.002 model of customresponse, making it slightly more robust when improperly used.

When replicating CourseEnrollment, make sure Users were created in all DBs before replicating other models

fix another backcompat html bug

Added fix for answer status and show answer to stay in the same place

BUG SMASH

{} -> {0} etc in .format statements

fix html rendering bug

Fix backcompat_module : html escape & py26

Hide chapters in addition to sections

Add facility for fixed number of problem attempts