Merge updated settings and raws from Splinterz

This merge does not include the settings source code, but includes
everything else.

* settings:
  raw changes for new options
  updated raws and new civ options
  updated gitignore for .suo file(s)
  removed .suo
  added deleted preview.png from the merge
  fixes, added 3rd party source
  fix for backwards 'simple' settings
  fixed random creature issue
  tileset color mapping, modified background, about button
  plant_grasses and missing color
  final cleanup for release version
  initial commit
Fix missing brackets on INVERTED_TILE tags
Normalise tilesets with formatting of harder invaders.

This patch simply enforces consistent formatting of the
harder invader changes associated with Splingerz' new
settings program.
Add missing braces around INVERTED TILE in masterwork tilesets and Obsidian Soul
Set previously missing YESTREE on BLACK_CAPs in ASCII tileset
Merge branch 'master' into settings

* master:
  Set previously missing YESTREE on BLACK_CAPs in ASCII tileset
  Add missing braces around INVERTED TILE in masterwork tilesets and Obsidian Soul
  Normalise tilesets with formatting of harder invaders.
  Fix missing brackets on INVERTED_TILE tags