fixes sass error
fixes js asset pipeline
styles log in modal
moves log-in modal and sign-up modal into partials. Adds comments to html. Adds basic styling to sign-up modal
adds additional stying to sign up modal
finishes both sign up and log in forms
Merge branch 'development' of https://github.com/felguerez/aircycle into login-signup-modal

Conflicts:
	web/app/assets/javascripts/application.js
	web/app/assets/javascripts/modal-positioner.js
	web/app/assets/stylesheets/air_cycle.css.scss
Merge pull request #94 from felguerez/login-signup-modal

Login signup modal