improve config file names (use yotta.json for the installation prefix config file); dont use ./etc/ on windows
improve config file names (use yotta.json for the installation prefix config file); dont use ./etc/ on windows

bridadan/yotta,ARMmbed/yotta,BlackstoneEngineering/yotta,iriark01/yotta,eyeye/yotta,autopulated/yotta,BlackstoneEngineering/yotta,stevenewey/yotta,theotherjimmy/yotta,stevenewey/yotta,ARMmbed/yotta,autopulated/yotta,ntoll/yotta,bridadan/yotta,eyeye/yotta,theotherjimmy/yotta,ntoll/yotta,iriark01/yotta