Change config file saving to use file stream
Change config file saving to use file stream

writing file using stream guarantees ordered file structure, which allows
convenient files comparison using simple diff tools

limemicro/lms7suite,romeojulietthotel/LimeSuite,romeojulietthotel/LimeSuite,romeojulietthotel/LimeSuite,limemicro/lms7suite,romeojulietthotel/LimeSuite,limemicro/lms7suite,limemicro/lms7suite,romeojulietthotel/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,limemicro/lms7suite