Merge pull request #1 from rkmontilla/demo

Deleted application.css and linked to mentor profile
created post model with relationship to user model
installed faker and seeded database
created page resource and updated index and show views
added create and update crud actions
associated users and pages
implemented pundit
configured app for heroku emails
cleaned up registration views and layout
added markdown
added avatar, pagination, and delete wiki option
refactored
Merge pull request #2 from rkmontilla/stripe

I'm  little confused by this PR, is the the pre-stripe PR? I don't see any stripe stuff in there.

For the method on the bottom, they are just defining a method to return an api key, so that you don't have ```ENV['SOME_API_KEY']``` all over the place. For example, you'll probably want a:

```ruby
def get_stripe_publishable_key
  ENV['STRIPE_PUBLISHABLE_KEY']
end
```

method to return the key for stripe.