FIXED: check  if cache migration is really needed
FIXED: logging system

 * Remove console from logging system's listeners when console window is
   closed
FIXED: detect broken version files

 * Automatically fix broken (Maps|ModPacks|Texturepacks)/*/version files
 * Rare bug but sometimes version file can contain null bytes
Cleaned printStackTrace()s

 * Replaced plain printStackTrace()s with Logger
 * Combined printStackTrace() and Logger.log*()
Merge pull request #728 from jikuja/fixes_for_1.3.10

Fixes for 1.3.10