Validation Errors - Upgrade

[mike-webster]

Description

It looks like whenever validations show up, it's just a red rectangle. Let's update the color in the error classes so we can actually see what the messages are saying.

Technical Details

• [x] Update to using bootstrap error classes
  • [X] New User Form
  • [x] Login Form
  • [x] New Pet Form
  • [x] New Event Form
• [x] Parse error messages for display