signin.html: update to use a horizontal form
signup.html: initial add
entry_list.html: initial add
js/lifelog.js: add a /signout route
js/lifelog.js: dont intercept requests
js/lifelog.js: use /api/session as the resource url to avoid cross-origin requests
js/lifelog.js: format json
js/lifelog.js: rename loginError to signinError
js/lifelog.js: add a SignupCtrl handler to allow for registrations on the site
signout.html: initial add