Release 5.2.1

ADDED: Javadoc to all internal api.
ADDED: A quiz to choose mods in the server.
ADDED: Log for launcher and minecraft.
ADDED: Option to save a bug into a file in the desktop.
ADDED: Compressor and Decompressor. Not implemented yet. (Thx to XZ
people!)
CHANGED: README.md
CHANGED: Changelog.
CHANGED: Retrocompatibility system temporally.
CHANGED: JRE necessary to run. Now it's needed JRE7 Update 11.
DELETED: Direct access.
FIXED: A bug that caused a bad interface initialization MultiMine.