Phish site with red warning

- Big red warning.
- Need better copy explaining the problem.
Improved copy

Phishing definition taken from OpenDNS :)
View: redirect or display phishing warning

- Check done in the Model. More testable, better separation of concerns.
- Increment visits when performing the redirect.
Cleanup phishes app

- Switch to cleaner URLField.
- Remove placeholder files.
Shortenings unit tests on the model