Improve region migration replicate acl, replicate by host, not instance

Purge task history, adding task 'purge_unused_disks'

Merge pull request globocom#302 from globocom/wiredTiger_cacheSizeGB

Wired tiger cache size gb

Add task name on tasks api

Put cache false on ajax

Remove eye of new notification

Do logic for save on cache if the notification was read or not

Remove commented code

Fiz notification css

Merge branch 'master' into prod_code