Merge pull request #20 from spderosso/master

Cosmetic changes in model
Merge pull request #21 from spderosso/master

figs for http run
A small fix in sop.als
Merge branch 'master' of https://github.com/eskang/500lines

Conflicts:
	same-origin-policy/src/sop.als
Added figures for script
Finished a draft of script and sop; merged the sections into chapter-part1
Added fig-http-*.png; more edits to the draft
Update chapter-part1.md
minor fixes in chapter