fix burstshot button being constantly active after use
update polish translation
don't overwrite photo if a file with the same name as calculated already exists; increment the counter until the unused name is found instead
Update zh_CN.po
Merge branch 'master' of git://github.com/zhcj/kamerka into zhcj-master

Conflicts:
	po/zh_CN.po
Update zh_CN.po
[Translations] Serbian files update
Try to fix strange characters from last commit
Merge pull request #20 from pejakm/serbtr

[Translations] Update Serbian
Merge pull request #19 from zhcj/patch-1

Update zh_CN.po