[Merge] lp:~danilo/ubuntu-keyboard/serbian-layout into lp:ubuntu-keyboard

[Данило Шеган]

I've added the accented vowels to the Serbian layout.  I am not happy with the current Keyboard_symbols.qml use for Serbian since there are characters that need to be more easily accessible (like appropriate quotes „“, ‘’, »« and dashes —, –), but that means redefining the entire layout (which might not be a bad idea, since we'll need it for the Serbian Latin layout as well).
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https://code.launchpad.net/~danilo/ubuntu-keyboard/serbian-layout/+merge/229876
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~danilo/ubuntu-keyboard/serbian-layout into lp:ubuntu-keyboard.