limeutil: flush the output when downloading
limeutil: flush the output when downloading

Removes that ugly terminal cursor lag

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