[Bug fix] rename 'laws' variable to 'tags' in LawController#newLaw action
Limit the homepage laws index to show only 4 laws
[#50] The law's name and summary are required fields
Some fixes and upgrades to the build

- Upgrade SailsJS version from RC to stable version
- Upgrade SailsJS postgresql module version from RC to stable version
- Setup database connection for production envioronment
- Removes deprecated express config file
- Creates new http config file
- Adds 'safe' option for models in production
Close #53 - Home page redesign
Close #58 - Laws & articles view redesign
Adapts sign in page to new design
Merge pull request #62 from eddie-ruva/feature/landing_page_redesign

Feature/landing page redesign
Merge pull request #64 from eddie-ruva/feature/landing_articles_view

Rediseño de vista de leyes y artículos
Merge pull request #65 from eddie-ruva/feature/sign_in_redesign

Feature/sign in redesign
Merge pull request #66 from CodeandoMexico/redesign

Merge Eddie's redesign
Add user authentication via Twitter
Add missing node-twitter-api instance
Fix routes. Add missing JS. Comment out unnecessary code.
Merge pull request #69 from CodeandoMexico/fix-routes-and-bugs

Fix routes. Add missing JS. Comment out unnecessary code.
Change user model
Merge pull request #70 from CodeandoMexico/twitter-login

Allow users to authenticate via Twitter
Allow logged-in users to create annotations and edit their own
Merge pull request #73 from CodeandoMexico/issue72-annotation-crud

[closes #72] Allow logged-in users to create annotations and edit their own
[fixes #74] Show annotation author correctly.