* Make the combo lock handle multiple users
On the Mark-1 the locking would fail since the first time the lock is
accessed the process is run under root (script checking the enclosure
version). This caused the locking to fail since the normal mycroft
processes got an access error (lock-file owned by root)
This change creates lock-files and sets the permissions to 0o777
if the file doesn't exist so it's accessible for all users
Also added an Apache license header
Adds the mycroft.util.combo_lock ComboLock class for interprocess/Thread
lock.
Loading updated to be more reliable:
- Flush and sync file
- wait 1.2 seconds before load
Split the logic from the locking so the lock can be avoided when calling
update from save or load from get.
Åke Forslund