Setup local packages repository

[sonnyyu]

Expand the Yún disk space:

Arduino way(overlay):

Expanding Yún Disk Space | Arduino Documentation

Linux way(root):

http://forum.arduino.cc/index.php?topic=228204.msg1651254#msg1651254

Multiple partitions(root):

http://forum.arduino.cc/index.php?topic=228204.msg1653830#msg1653830