This patch fixes some recently reported bugs, and includes a couple of balance updates.

Changelog for version 0.5.15

• Reworked Bard's skills to be able to play multiple songs at once
• Spellblade's Enchanted Blade level 3 now grants permanent True Strike
• Changed Hellbinder's Natural 20 quest to require killing 2 total enemies instead of 2 at once
• Fixed non HP damage (stun, sleep, mp) counting towards Sin boss's phase change threshold
• Fixed mouse click not registering on difficulty selection menu's OK button
• Fixed some bugs with Utility Belt relic modifying max uses incorrectly
• Improved Predator skill description to better convey how it works
• Fixed effect descriptions not having target/owner names properly parsed when viewing in mouseover
• Fixed Raider not properly using his Boomkit gadgets when under AI control
• Fixed Marine's The Right Tool quest incorrectly counting Reload as a valid gadget
• Fixed Doctor's ICU sprite not being removed properly when the target is revived another way before ICU triggers
• Fixed downed characters being able to play on-hit animations
• Fixed issue where Occultist Claire's sprite would remain rotated when revived by Medic's Amputate skill
• Fixed crash when dying Mirror boss tried to kill a still-revivable Secret Service or Immortal husk
• Fixed various other rare crashes