Updated POTFILES.in
Updated Polish translation
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Complete gcrypt initialization and set min version to 1.5.0

Current code for initialization is a nice safe
check when using the library but the recommended
is to do so in application level which assures us
to be using the configuration we want.

https://bugzilla.gnome.org/show_bug.cgi?id=738863
Updated Serbian translation
Updated Czech translation
Updated Czech translation