v0.17: Major graphics and UI improvements

This update focuses exclusively on visual improvements, adding a lot of new sprites and overhauling card/monster design, as well as some UI elements.
All terrains now have good-looking tile sets.

Minor UI changes:

• Redesigned card/monster/item visuals
  • Centered text, changed some colors and animations
• More than 30 improved card and item sprites by @MovingTheMovingPictures
• Updated tiles for Dungeon, Lava Pit, Cemetery, Chaos Realms terrains
  • Improved generation algorithm to get more structured backgrounds
• Tooltips now hide second-level keywords by default
• Card upgrades animate upgraded effects / costs
• Reward options visually grouped
• Status and resources hints now include both history and description
  • This fixed 'double tooltip' effect
• Music selection now displays track names
• Added new track by @MovingTheMovingPictures

Balance and miscellaneous changes:

• Renamed Rune of Endurance to Rune of Heartiness

Selected bugfixes:

• Fixed crash on 'Encounters may appear 1 level earlier' ascension
• Fixed item movement in rewards window
• Fixed some typos in card and item descriptions
• Play remaining indirect effects even after player won the stage.
  • Fixes e.g. Heroic Sword not getting the final increase when played indirectly
• Fixed status change animation overlap