Print exception when failing to initialize Minecraft

Conflicts:
	src/main/java/org/spoutcraft/launcher/GameLauncher.java
Prevented selection of non-empty directories for moving modpacks into.

Signed-off-by: Dalton Pelc <daltonjpelc@gmail.com>
Conflicts:
	src/main/java/org/spoutcraft/launcher/technic/skin/LauncherOptions.java
Localize previous commit
Changed over modpack moving method to apache moving as well.

Signed-off-by: Dalton Pelc <daltonjpelc@gmail.com>