Bugfixes

[jdreed129]

Fixes several bugs / design oversites, including:

• Made character names required to prevent infinite empty characters
• Made tree names required to do the same for trees
• Fixed homepage height not extending properly
• Changed relationship table to allow multiple relationships with distinct types between two characters
• Fixed recursion errors by:
  • Preventing characters from being in a relationship with themselves
  • Preventing characters from being made their own ancestors (parent-child loops)
• Made Vis access colors via the relationship object (which gets them from a join), allowing the removal of excess if/else statements