Update 04-factorseq.md

update a few comments
Updated webppl submodule
Merge pull request #10 from aflaxman/ch4-comment-fix

Update two comments in 04-factorseq.md
Updated webppl submodule
Updated examples to reflect new utilities and builtins
Merge branch 'gh-pages' of https://github.com/probmods/dippl into gh-pages
Updated webppl submodule
Revert webppl
Update webppl
Only render editor if container available
Undo layout changes for now
fixup regression to utilities
Updated webppl submodule
Merge branch 'gh-pages' of https://github.com/probmods/dippl into gh-pages
Updated webppl submodule
Revert to older version of webppl
Return to latest webppl...
Updated webppl submodule
Merge branch 'gh-pages' of https://github.com/probmods/dippl into gh-pages
commas and args