Launcher 0.1

0.1 was a first major launcher version released on April 18, 2013.

Changes

 * .minecraft directory structure is changed:
 * "assets" folder; stores resources such as language packs and sounds.
 * All music discs now use .ogg format instead of .mus format.
 * "library" folder; stores Java libraries such as LWJGL and jinput.jar.
 * "versions" folder; there are file "versions.json" (meta data) and folders that stores minecraft.jar for each versions (but its name is same as its version. e.g. for 13w16a, "versions/13w16a/13w16a.jar").
 * The launcher is an executable.