Post: CSRF - grammar adjustments

and some sentence refactoring
Post: CSRF - fix bug in js

call() takes individual arguments, apply() takes an array. I guess
we don't call submit() with arguments very often cause this was broken
Post: CSRF - improve the paragraph about deployment
Post: CSRF - more grammar fixes, yay proofreading
Post: CSRF - replace js with embedded gist

cause that's cool.