Merge branch '1.7-vault-misc' into 'master'

1.7 vault misc: return of the bandit fortress

The return of the bandit fortress vault: new and improved as a sublevel vault that doesn't cause the game to lag and slow!  

Also includes a few misc lore notes for the new bandit fortress vault as well as the vor pride special vault and reduces the size of the greater checkerboard vault while adding a randboss guardian to attend to players snooping about in dark sealed rooms. The lore notes are much more meant to be fun throwaway additions to add more life to the vaults than they are actual lore.

See merge request !641