Merge pull request #870 from momomok/kitkat

Updated translation for Traditional Chinese (zh-rTW) (KK branch)
Updated Japanese Translation
Merge pull request #871 from WedyDQ10/patch-10

Updated Japanese Translation
 Updated Chinese (Simplified) translations (thanks to Asx)
Merge pull request #873 from liveasx/patch-75

 Updated Chinese (Simplified) translations (thanks to Asx)
UNC optimizations
- Moved generic LED functionality from package context under
notification manager service context
- reduced preference reloading
- reduced QuietHours helper class re-creation
UNC: added option to specify time interval for Alert only once feature
Will perform sound/vib alert for existing notification again after
user-defined timeout expires.
Updated French translation [KK]

UNC: added option to specify time interval for Alert only once feature
Merge pull request #874 from ch-vox/patch-33

Updated French translation [KK]
Merge remote-tracking branch 'upstream/kitkat' into kitkat