delete works, input and popovers fixed, doubleslash
subcircuits and instances in different files should now work properly
Lab 3 checkoffs modified to work with new syntax
updates to gatesim.js, add .gitignore for backup files
tmsim improvements to fit new interface
connect device now looks like other devices
now actually fixed
fixed octal digits in checkoff; adding DC plots; parsing voltage source function values
support for .connect
Revert presumably unintentional change to common.css.
Visual improvements to the schematic view.
The schematic view now scales to fit the viewport.
Added access highlighting to the stack view.

TODO: refactor and deduplicate this code.
Merge branch 'master' into bsim. Weird gatesim conflict?

Conflicts:
	jsim/gatesim/gatesim.js
Added new BSim-compatible uasm files.
tmsim visual improvements
Merge branch 'master' of https://github.com/6004x/6.004x
Added save all button.
Added browser check.
Merge branch 'master' of github-mattpf:6004x/6.004x