JsonCpp: sync lib, add cmake key for build with local copy or system lib
cmake: merged FindLua{51,52}.cmake
Mongoose: 3.8->3.9
Miniupnpc: 1.7->1.8
cmake up
miniupnpc: add miniupnpcstrings.h.cmake
doc up
Translations were updated from Transifex.
Translations were updated from Transifex.
Translations were updated from Transifex.