Launcher 1.5

1.5 was a major update to the launcher released on July 28, 2014.

Changes

 * Development Console tab renamed to Launcher Log
 * The player can now run multiple instances of Minecraft at once, provided they're on different users
 * Play button renamed to Already Playing... if Minecraft is open while looking at launcher
 * New tab called Game Output (yourusername) appears after launching minecraft