add waffle.io badge
Merge pull request #20 from waffle-iron/master

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First attempt at setting up Travis CI
Merge branch 'master' of github.com:jgonera/howwrong
Update readme

Mostly to trigger a Travis build.
See if Travis picks ruby version up from .ruby-version

Also, create .ruby-gemset for RVM instead of comments in Gemfile.
Create DB user in Travis
Try this, Travis
OK, Travis, I'll do what you want me to do

http://docs.travis-ci.com/user/using-postgresql/
Add Travis badge, so that we know that our build is failing
Allow different voting URL for normal and quiz questions
Die resource routing

It's a mess that works only for typical CRUD.
Create abstract BaseQuestionsController
Extract common stuff into BaseQuestionsController
Show link to next question in quizzes

Also:
* change quiz routes to use question number instead of a slug,
* add pry to Gemfile for easier debugging
Fix tests
Make the first question number 1 in quiz URL
Be explicit where we want next_question_path
Move the next button outside of application layout
Rename next_question_path to next_path

Can be used for Done button too.