Createcharacters

We have created the database, created the characters views,models, controllers, factories, and tests. All things work except for the user_views_all_characters_spec on the portion that mentions the matchups. We also did not edit the user_creates_a_matchup_spec.rb since it is not in our domain. 
Use newer syntax for validations:

```ruby
validates :name,
  presence: true,
  uniqueness: true
```