Perform validation of values entered

[kabili207]

There are various combinations of values that could result in unexpected behavior when a secret is used. Functions to validate a secret should be created to check for these cases.

• Child values should be constrained to a maximum value for linked secrets. See this analysis.
• Function should also be created to allow users to create a valid value from rules used by the game. (added with 10e1b7d)
• The free ring given value should be checked for each secret type.
• None should not be an allowed animal friend value when creating a secret for Seasons. (See bug Remove "None" for the animal companion #7)
• Verify that users haven't inserted invalid values into enums
  • Animal friend
  • Memory values
• Allow loading of rings from mismatched game IDs