Adding new backstories into the game

With VEF you can now add new backstories in the game via XML. Example of usage:

<VFECore.BackstoryDef>
  <defName>UT_SlumDweller</defName>
  <title>Slum Dweller</title>
  <titleShort>Favelado</titleShort>
  <baseDescription>[PAWN_nameDef] was raised in one of the many shanty towns on a highly populated industrial world in a local community. Food was hard to come by and had to be scavenged, [PAWN_pronoun] used numerous methods to survive without drawing too much attention from law enforcement.</baseDescription>
  <slot>Childhood</slot>  <!-- accepts Childhood and Adulthood values -->
  <spawnCategories>       <!-- spawnCategories work as filters, usually to match faction backstoryFilters or PawnKindDef spawn categories overrides -->
    <li>Offworld</li>
    <li>Outlander</li>
    <li>ImperialCommon</li>
  </spawnCategories>
  <maleCommonality>40</maleCommonality> <!-- an optional field, responsible for gender restriction. 40% chance for male means 60% chance for females in this case. -->
  <chronologicalAgeRestriction>18~60</chronologicalAgeRestriction> <!-- an optional field, this one is responsible for chronological age restriction. 
																	The 18~60 value will restrict the backstory to pawns with 18 - 60 chronological years. -->
  <biologicalAgeRestriction>18~60</biologicalAgeRestriction> <!-- an optional field, the same logic as above but with biological age. -->																	
  <skillGains>            <!-- A list of skill gains. Determines skill gains that the backstory provides to the pawn with it. -->
    <Social>1</Social>
    <Crafting>2</Crafting>
    <Melee>2</Melee>
  </skillGains>
  <workDisables> <!-- A list of work tags to disable. Determines if the backstory will disable work types for the pawn.
		      Accepts following WorkTags values:
			None
			ManualDumb
			ManualSkilled
			Violent
			Caring
			Social
			Commoner
			Intellectual
			Animals
			Artistic
			Crafting
			Cooking
			Firefighting
			Cleaning
			Hauling
			PlantWork
			Mining
			Hunting
			Constructing
			Shooting
			AllWork
		-->
    <li>Intellectual</li>
  </workDisables>
  <disallowedTraits> <!-- A list of disallowed traits that won't appear in the backstory. You can specify defName, chance (optional) and degree (optional) values. -->
    <li>
      <defName>Gourmand</defName>
    </li>
  </disallowedTraits>
  <forcedTraits> <!-- A list of forced traits that will appear in the backstory. You can specify defName, chance (optional) and degree (optional) values. -->
    <li>
      <defName>Neurotic</defName>
      <degree>1</degree>
      <chance>0.5</chance>
    </li>
  </forcedTraits>
  <shuffleable>true</shuffleable> <!-- Determines if the backstories will be choosen randomly in the backstory pool. Otherwise it's meant to be used for specific pawns and be loaded in a specific C# code -->
</VFECore.BackstoryDef>