Create a json string that is readable by the server (will be later sent). Closes #54 (closed) Major refactors and cleanup of the host code. This includes SD card specific utilities, moving logging to separate files, move commonly used definitions to a separate file. Closes #56 (closed) Renamed TimeManager to NTPManager to better reflect its purpose in the project. Try remounting SD after a number of failed attempts (see Definitions.h) Early exit continuous SD access if the SD has not been found before. Closes #47 (closed)