Update v0.9: Card upgrades, new hero

This update introduces lots of new content. Each of 270+ cards in the game can now be upgraded, adding new dimension to player's strategy. The balance of the game changed significantly, but overall winning became easier. Future updates are planned to add new, more powerful monsters.

New hero: 'Troubadour' specializes on 'amplify' and 'repeat' mechanics, with St/Wp as primary resources.  Troubadour can be considered a challenge hero. His unique effect makes card play order extremely important, forcing player to carefully consider consequences even for normally simple cards.

Full changelog:

Major gameplay changes:

• Cards can now be upgraded, either from rewards window or by effects
  • Upgrade price grows similar to card removal
  • Most cards can be upgraded indefinitely, with few balance-related exceptions, e.g. 'Stop Time'
  • By default card upgrades are locked behind a new achievement
  • Сard rewards have a chance to be pre-upgraded
• Save and auto-save now work both during the stage and between stages
  •  Saved state is always at the beginning of either battle or reward selection
• You can now rearrange items by pressing 'Items' button on rewards window
  • Some item combinations give different outcomes depending on order, e.g. 'Chain Mail' vs 'Bugle'
• New 'Initiative' card effect
  • Cards in draw pile are sorted by decreasing initiative, cards with same initiative shuffled
  • Without the effect, card initiative is considered to be 0
• 'Amplified' status now can be applied to monsters as well as to hero

Minor gameplay changes:

• Negative 'vitality' damage now ignores 'protected' status
• 'Adapt' card now ignores 'amplified' status

Minor UI changes:

• Effect preview now takes into account enemy immunities
• Monster list filter now also searches by habitats
• 'Turn order' tab in information window replaced with 'More info' tab, documenting:
  • Turn order, now with more details
  • Interaction of various damage types and statuses
  • Card numbering and references
• Hero resources are now displayed in rewards window
• Unplayable cards in hand are now always marked
• Clarified distinction between hero and monster statuses in effect descriptions
• Clarified 'on pickup' effects in item descriptions
• Display chances of rare and upgraded card rewards in stage hint
• Added some new sounds

New hero:

•  Troubadour. This hero, although powerful, is quite hard to play, intended for experienced players.

New cards (16):

• Drill for Magic, Limited Offer, First Blood, Rune of Haste, Rune of Perfection, Black Ink, Soothing Tune, Screeching Tune, Lockstep, Tremolo, Curtain Call,  Dramatic Entrance, Once More with Feeling, Crescendo, Quiet Chant, Focus

New items (14):

• Bounty: Dragons, Diadem of Suffering, First Aid Kit, Bookmarked Tome, Easel,  Sourdine, Ember Log, Tuning Fork, Red Seven, Deformed Coin,  Ace of Diamonds, Ace of Clubs, Ace of Hearts, Tome of Ice and Fire

New monsters (7):

• Scavenger Rat, Rat King, Deep One, Deeper One, Deepest One, Cuttlefish, Great Hydra

Changed monsters:

• Bloated One, Ancient Lich

New quests (6):

• 'Art fair: Carve a perfect ice sculpture'
• 'Art fair: Showcase your best work'
• 'Swim during the thunderstorm'
• 'Music hall: Conduct an orchestra'
• 'Music hall: Hold a long pause'
• 'Campfire: Watch glowing embers all night'